





Network Working Group                                  D. Throop, Editor
Request for Comments: 1382                      Data General Corporation
                                                           November 1992


              SNMP MIB Extension for the X.25 Packet Layer

Status of this Memo

   This RFC specifies an IAB standards track protocol for the Internet
   community, and requests discussion and suggestions for improvements.
   Please refer to the current edition of the "IAB Official Protocol
   Standards" for the standardization state and status of this protocol.
   Distribution of this memo is unlimited.

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in TCP/IP-based internets.
   In particular, it defines objects for managing the Packet Layer of
   X.25.  The objects defined here, along with the objects in the "SNMP
   MIB Extension for LAPB" [9] and the "Definitions of Managed Objects
   for RS-232-like Hardware Devices" [8], combine to allow management of
   an X.25 protocol stack.

Table of Contents

   1. The Network Management Framework .......................    2
   2. Objects ................................................    2
   2.1 Format of Definitions .................................    3
   3. Overview ...............................................    3
   3.1 Informal Overview .....................................    3
   3.2 Textual Conventions ...................................    4
   3.3 Structure of MIB ......................................    4
   3.4 Tables ................................................    5
   3.5 Table Usage ...........................................    6
   3.6 Conformance ...........................................    6
   4. Object Definitions .....................................    7
   5. Appendix: Revision History .............................   62
      July 30 1992 ...........................................   62
      June 26 1992 ...........................................   62
      June 1992 ..............................................   63
      April 1992 .............................................   63
      February 1992 ..........................................   65
      October 1991 ...........................................   65
      June 1991 ..............................................   66
      April 1991 .............................................   66
   6. Acknowledgements .......................................   66



Throop                                                          [Page 1]

RFC 1382                 X.25 Packet Layer MIB             November 1992


   7. References .............................................   67
   8. Security Considerations ................................   68
   9. Author's Address .......................................   69

1.  The Network Management Framework

   The Internet-standard Network Management Framework consists of three
   components.  These components give the rules for defining objects,
   the definitions of objects, and the protocol for manipulating
   objects.

   The network management framework structures objects in an abstract
   information tree. The branches of the tree name objects and the
   leaves of the tree contain the values manipulated to effect
   management. This tree is called the Management Information Base or
   MIB. The concepts of this tree are given in STD 16/RFC 1155, "The
   Structure of Management Information" or SMI [1]. The SMI defines the
   trunk of the tree and the types of objects used when defining the
   leaves. STD 16/RFC 1212, "Towards Concise MIB Definitions" [4],
   defines a more concise description mechanism that preserves all the
   principals of the SMI.

   The core MIB definitions for the Internet suite of protocols can be
   found in RFC 1156 [2] "Management Information Base for Network
   Management of TCP/IP-based internets". STD 17/RFC 1213 [5] defines
   MIB-II, an evolution of MIB-I with changes to incorporate
   implementation experience and new operational requirements.

   STD 15/RFC 1157 [3] defines the SNMP protocol itself. The protocol
   defines how to manipulate the objects in a remote MIB.

   The tree structure of the MIB allows new objects to be defined for
   the purpose of experimentation and evaluation.

2.  Objects

   The definition of an object in the MIB requires an object name and
   type.  Object names and types are defined using the subset of
   Abstract Syntax Notation One (ASN.1) [6] defined in the SMI [1].
   Objects are named using ASN.1 object identifiers, administratively
   assigned names, to specify object types.  The object name, together
   with an optional object instance, uniquely identifies a specific
   instance of an object.  For human convenience, we often use a textual
   string, termed the OBJECT DESCRIPTOR, to also refer to objects.

   Objects also have a syntax that defines the abstract data structure
   corresponding to that object type.  The ASN.1 language [6] provides
   the primitives used for this purpose.  The SMI [1] purposely



Throop                                                          [Page 2]

RFC 1382                 X.25 Packet Layer MIB             November 1992


   restricts the ASN.1 constructs which may be used for simplicity and
   ease of implementation.  The encoding of an object type simply
   describes how to represent an object using ASN.1 encoding rules [7],
   for purposes of dealing with the SNMP protocol.

2.1.  Format of Definitions

   Section 4 contains the specification of all object types defined in
   this MIB module.  The object types are defined using the conventions
   defined in the SMI, as amended by the extensions specified in
   "Towards Concise MIB Definitions" [4].

3.  Overview

3.1.  Informal Overview

   This section describes how the objects defined below relate with
   other MIBs.  This section is only informational to help understand
   how the pieces fit together.

   The objects defined below are used in conjunction with MIB-II and
   other MIBs such as the LAPB MIB [9].  A system with a complete X.25
   stack running over a synchronous line will have at least two
   interfaces in the ifTable defined in MIB-II.  There will be an
   interface for LAPB and another interface for the packet layer of
   X.25. There will also be objects defined in the RS-232-like MIB for
   the physical sync line.

   Each software interface identifies the layer below it used to send
   and receive packets. The X.25 MIB object, defined below,
   x25OperDataLinkId, specifies an instance of lapbAdmnIndex for the
   LAPB interface under that X.25. The LAPB object, lapbOperPortId,
   identifies an instance of the rs232PortIndex for the the Sync line
   used by LAPB.

   For X.25 running over LAPB over Ethernet, the lapbOperPortId would
   identify the instance of ifIndex for the Ethernet interface.

   Each X.25 subnetwork will have separate entries in the ifTable.  Thus
   a system with two X.25 lines would have two ifTable entries for the
   two X.25 packet layers and two other entries for the two LAPB
   interfaces. Each X.25 Packet Layer MIB would identify the instance of
   the LAPB MIB for the interface below it. Each LAPB MIB would identify
   the Sync line below it. The system would also have two entries in the
   rs232PortTable and rs232SyncPortTable for the two physical lines.

   Since the ifTable as defined in MIB-II is device independent, it
   doesn't have anything specific for any type of interface.  The



Throop                                                          [Page 3]

RFC 1382                 X.25 Packet Layer MIB             November 1992


   objects below define the X.25 packet layer specific information for
   an interface of type X.25. Different X.25 interfaces can also be
   differentiated by matching the values of ifIndex with x25AdmnIndex.

3.2.  Textual Conventions

   This MIB introduces a new data type as a textual convention for use
   with X.25.  This textual convention enhances the readability of the
   specification and can ease comparison with other specifications if
   appropriate.  It should be noted that the introduction of such
   textual conventions has no effect on either the syntax nor the
   semantics of any managed objects.  These conventions are merely an
   artifact of the explanatory method used.  Objects defined in terms of
   one of these methods are always encoded by means of the rules that
   define the primitive type.  Hence, no changes to the SMI or the SNMP
   are necessary to accommodate these textual conventions which are
   adopted merely for the convenience of readers and writers in pursuit
   of the elusive goal of clear, concise, and unambiguous MIB documents.

   This MIB introduces the data type of:

                       X121Address

3.3.  Structure of MIB

   Instances of the objects defined below represent attributes of an
   X.25 Packet Layer interface.  At present these interfaces are
   identified by an ifType object in the Internet-standard MIB-II [5]
   of:

                 ddn-x25(4), and
                 rfc887-x25(5).

   For these interfaces, the value of the ifSpecific variable in the
   MIB-II [5] has the OBJECT IDENTIFIER value:

                 x25    OBJECT IDENTIFIER ::= { transmission 5 }

   The objects defined below are similar to those defined in a draft ISO
   document for X.25 management [11]. Some object definitions also
   reference the ISO specification for X.25 [10] to specify  the section
   that will give the reader additional information about the object.
   Access to those documents maybe useful (but isn't essential) to
   understand the names and semantics of some objects.  The similarity
   of these objects with the ISO objects minimizes the instrumentation
   required by those systems that support both OSI and TCP/IP management
   protocols.




Throop                                                          [Page 4]

RFC 1382                 X.25 Packet Layer MIB             November 1992


   Since the objects defined here are extensions to the Internet
   Standard MIB [2] and thus also an extension of the second version,
   MIB-II [5], the objects defined here explicitly do not duplicate
   objects defined in existing standards.  In some instances
   clarification of how to apply those objects has been given.

   The relationship between an X.25 Packet Layer interface and an
   interface in the context of the Internet-standard MIB [5] is one-to-
   one. As such, the value of an ifIndex object instance can be directly
   used to identify corresponding instances of the objects defined
   below.

3.4.  Tables

   The objects below form several tables.  These tables are:

                               x25AdmnTable
                               x25OperTable
                               x25StatTable
                               x25ChannelTable
                               x25CircuitTable
                               x25ClearedCircuitTable
                               x25CallParmTable

   The x25AdmnTable defines objects for the parameters of an X.25
   interface which the administrator can read and set.  These objects
   are used at interface initialization time to start the interface.
   Once the interface has started, changes to the objects in the
   Administration table may not take affect until the interface is re-
   initialized.

   The x25OperTable defines objects that report the current parameters
   used by a running interface.  These objects are read-only.

   The x25StatTable defines objects that report operational statistics
   for an X.25 interface.  These are read-only counters of events that
   occurred at the interface.

   The x25ChannelTable defines objects to allow the administrator to
   manage the division of channel numbers.

   The x25CircuitTable defines objects that return information about
   existing X.25 circuits.  These entries result from calls placed or
   answered by the PLE or from PVCs.

   The x25ClearedCircuitTable contains objects for recording the
   termination information from circuits that cleared abnormally.




Throop                                                          [Page 5]

RFC 1382                 X.25 Packet Layer MIB             November 1992


   The x25CallParmTable defines the call parameters used to call other
   systems.  This table contains call parameter entries which are
   referenced by other tables.  For example, the x25AdmnTable has one
   object that identifies the entry in the table for the default PLE
   parameters.  The x25CircuitTable has one object that identifies the
   entry in the x25CallParmTable for the parameters in use by that
   circuit.  Other MIBs may also reference entries to identify call
   parameters to use to make X.25 calls.

3.5.  Table Usage

   Different tables provide different functions.  The administrator sets
   the starting X.25 parameters in the x25AdmnTable for the X.25 PLE;
   these objects include a reference to the x25CallParmTable entry to
   identify the default call parameters for the PLE.  Once all the
   parameters are set, the administrator initializes the interface.  As
   part of initializing the interface, the operating parameters are
   copied into the interface from the x25AdmnTable; these parameters are
   viewable by getting the objects in the x25OperTable.  (The interface
   maybe started by setting the value of ifAdminStatus to up.)  If any
   PVCs are configured, their parameters can be set in the the
   x25CircuitTable before initializing the interface; this should be
   done in conjunction with configuring higher layer entities to use the
   PVCs via the MIBs for those entities.

   Once the PLE completes initialization, it makes additional entries in
   the x25circuitTable for calls placed or answered.  When a circuit is
   cleared, the status of the entry for the circuit is set to closed
   and, if the clear is abnormal, an entry will also be made in the
   x25ClearedCircuitTable.  An entry in the x25CircuitTable with a
   status of closed maybe deleted by the agent at its convenience.  A
   closed entry will always be reused at the time the PLE re-allocates
   the channel number of the entry for another call.  The call
   parameters used for a circuit can be found by looking in the
   x25CircuitTable and following the x25CircuitCallParamId pointer to
   the entry in the x25CallParmTable that contains the parameters.

   There are no mechanisms in the X.25 MIB for telling the PLE to place
   an X.25 call. Such mechanisms belong in the MIBs for the higher layer
   entities that use the X.25 circuits.

3.6.  Conformance

   All the objects defined here are mandatory. To claim conformance with
   this MIB an implementation must support all objects.  However some
   objects pertain to features that are optional.  There are values
   defined for those objects that indicate the implementation does not
   support the optional feature.  The agent for such an implementation



Throop                                                          [Page 6]

RFC 1382                 X.25 Packet Layer MIB             November 1992


   must support reading the object and return the value that indicates
   the optional feature isn't supported and reject set requests to
   change the object.

   Some optional features have more than one object that pertain to it
   (window rotation has a timer, a count, and a counter for timer
   runouts).  In such case, any object which indicates the optional
   feature isn't supported is sufficient to indicate the feature isn't
   supported and the values of the other objects relative to that
   feature are undefined.

4.  Object Definitions


          RFC1382-MIB DEFINITIONS ::= BEGIN

          IMPORTS
                  Counter, Gauge, TimeTicks
                          FROM RFC1155-SMI
                  OBJECT-TYPE
                          FROM RFC-1212
                  DisplayString, transmission
                          FROM RFC1213-MIB
                  TRAP-TYPE
                          FROM RFC-1215
                  EntryStatus
                          FROM RFC1271-MIB
                  PositiveInteger,
                  IfIndexType
                          FROM RFC1381-MIB;

          x25     OBJECT IDENTIFIER ::= { transmission 5 }


          -- Support of the X25 subtree and all subtrees under it
          -- is mandatory for all agents of system that implement X.25.

          X121Address ::= OCTET STRING (SIZE(0..17))
           -- 0 to 17 bytes in length containing the ASCII
           -- characters [0-9], each octet contains one digit
           -- of the address.


          -- ###########################################################
          --            X.25 Administration Table
          -- ###########################################################

          x25AdmnTable OBJECT-TYPE



Throop                                                          [Page 7]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  SYNTAX  SEQUENCE OF X25AdmnEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "This table contains the administratively
                          set configuration parameters for an X.25
                          Packet Level Entity (PLE).

                         Most of the objects in this table have
                          corresponding objects in the x25OperTable.
                          This table contains the values as last set
                          by the administrator.  The x25OperTable
                          contains the values actually in use by an
                          X.25 PLE.

                          Changing an administrative value may or may
                          not change a current operating value.  The
                          operating value may not change until the
                          interface is restarted.  Some
                          implementations may change the values
                          immediately upon changing the administrative
                          table.  All implementations are required to
                          load the values from the administrative
                          table when initializing a PLE."
                  ::= { x25 1 }

          x25AdmnEntry OBJECT-TYPE
                  SYNTAX  X25AdmnEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "Entries of x25AdmnTable."
                  INDEX { x25AdmnIndex }
                  ::= { x25AdmnTable 1 }

          X25AdmnEntry ::= SEQUENCE {
                  x25AdmnIndex
                          IfIndexType,
                  x25AdmnInterfaceMode
                          INTEGER,
                  x25AdmnMaxActiveCircuits
                          INTEGER,
                  x25AdmnPacketSequencing
                          INTEGER,
                  x25AdmnRestartTimer
                          PositiveInteger,
               x25AdmnCallTimer
                          PositiveInteger,



Throop                                                          [Page 8]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  x25AdmnResetTimer
                          PositiveInteger,
                  x25AdmnClearTimer
                          PositiveInteger,
                  x25AdmnWindowTimer
                          PositiveInteger,
                  x25AdmnDataRxmtTimer
                          PositiveInteger,
                  x25AdmnInterruptTimer
                          PositiveInteger,
                  x25AdmnRejectTimer
                          PositiveInteger,
                  x25AdmnRegistrationRequestTimer
                          PositiveInteger,
                  x25AdmnMinimumRecallTimer
                          PositiveInteger,
                  x25AdmnRestartCount
                          INTEGER,
                  x25AdmnResetCount
                          INTEGER,
                  x25AdmnClearCount
                          INTEGER,
                  x25AdmnDataRxmtCount
                          INTEGER,
                  x25AdmnRejectCount
                          INTEGER,
                  x25AdmnRegistrationRequestCount
                          INTEGER,
                  x25AdmnNumberPVCs
                          INTEGER,
                  x25AdmnDefCallParamId
                          OBJECT IDENTIFIER,
                  x25AdmnLocalAddress
                          X121Address,
                  x25AdmnProtocolVersionSupported
                          OBJECT IDENTIFIER
                  }

          x25AdmnIndex OBJECT-TYPE
                  SYNTAX  IfIndexType
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                  "The ifIndex value for the X.25 Interface."
                  ::= { x25AdmnEntry 1 }

          x25AdmnInterfaceMode OBJECT-TYPE
                  SYNTAX  INTEGER {



Throop                                                          [Page 9]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                                  dte (1),
                                  dce (2),
                                  dxe (3)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Identifies DCE/DTE mode in which the
                          interface operates.  A value of dxe
                          indicates the mode will be determined by XID
                          negotiation."
                  REFERENCE "10733 5.9 interfaceMode"
                  ::= { x25AdmnEntry 2 }

          x25AdmnMaxActiveCircuits        OBJECT-TYPE
                  SYNTAX  INTEGER (0..4096)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The maximum number of circuits this PLE can
                          support; including PVCs."
                  REFERENCE "10733 5.9 maxActiveCircuits;
                          See ISO 8208, Section 3.7"
                  ::= { x25AdmnEntry 3 }

          x25AdmnPacketSequencing OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  modulo8 (1),
                                  modulo128 (2)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The modulus of the packet sequence number
                          space."
                  REFERENCE "10733 extendedPacketSequencing;
                          See ISO 8208 Section 7.1.1"
                  ::= { x25AdmnEntry 4 }

          x25AdmnRestartTimer OBJECT-TYPE
               SYNTAX     PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T20 restart timer in milliseconds."
                  REFERENCE "10733 5.9 restartTime
                          See ISO 8208 Section 4.1, table 26"
                  ::= { x25AdmnEntry 5 }



Throop                                                         [Page 10]

RFC 1382                 X.25 Packet Layer MIB             November 1992


          x25AdmnCallTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T21 Call timer in milliseconds."
                  REFERENCE "10733 callTime;
                          See ISO 8208 Section 5.2.1, table 26"
                  ::= { x25AdmnEntry 6 }

          x25AdmnResetTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T22 Reset timer in milliseconds."
                  REFERENCE "10733 resetTime;
                          See ISO 8208 Section 8.1, table 26"
                  ::= { x25AdmnEntry 7 }

          x25AdmnClearTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T23 Clear timer in milliseconds."
                  REFERENCE "10733 clearTime;
                          See ISO 8208 Section 5.5.1, table 26"
                  ::= { x25AdmnEntry 8 }

          x25AdmnWindowTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T24 window status transmission timer in
                          milliseconds.  A value of 2147483647
                          indicates no window timer in use."
                  REFERENCE "10733 5.10.1 windowTime (opt);
                          See ISO 8208 Section 11.2.2, table 26"
                  ::= { x25AdmnEntry 9 }

          x25AdmnDataRxmtTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T25 data retransmission timer in



Throop                                                         [Page 11]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          milliseconds.  A value of 2147483647
                          indicates no data retransmission timer in
                          use."
                  REFERENCE "10733 5.10.1 dataRetransmissionTime (opt);
                          See ISO 8208 Section 11.2.1, table 26"
                  ::= { x25AdmnEntry 10 }

          x25AdmnInterruptTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T26 interrupt timer in milliseconds.  A
                          value of 2147483647 indicates no interrupt
                          timer in use."
                  REFERENCE "10733 interruptTime;
                          See ISO 8208 Section 6.8.1, table 26"
                  ::= { x25AdmnEntry 11 }

          x25AdmnRejectTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T27 Reject retransmission timer in
                          milliseconds.  A value of 2147483647
                          indicates no reject timer in use."
                  REFERENCE "10733 5.10.1 dataRejectTime (opt);
                          See ISO 8208 Section 13.4.1, table 26"
                  ::= { x25AdmnEntry 12 }

          x25AdmnRegistrationRequestTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The T28 registration timer in milliseconds.
                          A value of 2147483647 indicates no
                          registration timer in use."
                  REFERENCE "10733 5.8.1 registrationRequestTime (opt)
                          See ISO 8208    Section 13.1.1.1, table 26"
                  ::= { x25AdmnEntry 13 }

          x25AdmnMinimumRecallTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION



Throop                                                         [Page 12]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          "Minimum time interval between unsuccessful
                          call attempts in milliseconds."
                  REFERENCE "10733 5.9 minimum RecallTimer"
                  ::= { x25AdmnEntry 14 }

          x25AdmnRestartCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The R20 restart retransmission count."
                  REFERENCE "10733 5.9 restartCount;
                          See ISO 8208    Section 4.1, table 27"
                  ::= { x25AdmnEntry 15 }

          x25AdmnResetCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The r22 Reset retransmission count."
                  REFERENCE "10733 resetCount;
                          See section ISO 8208 8.1, table 27"
                  ::= { x25AdmnEntry 16 }

          x25AdmnClearCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                  "The r23 Clear retransmission count."
                  REFERENCE "10733 clearCount;
                          See ISO 8208 Section 5.5.1, table 27"
                  ::= { x25AdmnEntry 17 }

          x25AdmnDataRxmtCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The R25 Data retransmission count.  This
                          value is irrelevant if the
                          x25AdmnDataRxmtTimer indicates no timer in
                          use."
                  REFERENCE "10733 5.10.1 dataRetransmissionCount (opt)
                          See ISO 8208 Section 11.2.1, table 27"
                  ::= { x25AdmnEntry 18 }




Throop                                                         [Page 13]

RFC 1382                 X.25 Packet Layer MIB             November 1992


          x25AdmnRejectCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The R27 reject retransmission count.  This
                          value is irrelevant if the
                          x25AdmnRejectTimer indicates no timer in
                          use."
                  REFERENCE "10733 5.10.1 dataRejectCount (opt)"
                  ::= { x25AdmnEntry 19 }

          x25AdmnRegistrationRequestCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The R28 Registration retransmission Count.
                          This value is irrelevant if the
                          x25AdmnRegistrationRequestTimer indicates no
                          timer in use."
                  REFERENCE "10733 5.8.1 registrationRequestCount (opt);
                          See ISO 8208    Section 13.1.1.1, table 27"
                  ::= { x25AdmnEntry 20 }

          x25AdmnNumberPVCs OBJECT-TYPE
                  SYNTAX  INTEGER (0..4096)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of PVC configured for this PLE.
                          The PVCs use channel numbers from 1 to this
                          number."
                  ::= { x25AdmnEntry 21 }

          x25AdmnDefCallParamId OBJECT-TYPE
                  SYNTAX  OBJECT IDENTIFIER
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "This identifies the instance of the
                          x25CallParmIndex for the entry in the
                          x25CallParmTable which contains the default
                          call parameters for this PLE."
                  ::= { x25AdmnEntry 22 }

          x25AdmnLocalAddress OBJECT-TYPE
                  SYNTAX  X121Address



Throop                                                         [Page 14]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The local address for this PLE subnetwork.
                          A zero length address maybe returned by PLEs
                          that only support PVCs."
                  REFERENCE "10733 5.9 localDTEAddress"
                  ::= { x25AdmnEntry 23 }

          x25AdmnProtocolVersionSupported OBJECT-TYPE
                  SYNTAX  OBJECT IDENTIFIER
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Identifies the version of the X.25 protocol
                          this interface should support.  Object
                          identifiers for common versions are defined
                          below in the x25ProtocolVersion subtree."
                  REFERENCE "10733 5.9 protocolVersionSupported"
                  ::= { x25AdmnEntry 24 }


          -- ###########################################################
          --            X.25 Operational Table
          -- ###########################################################

          x25OperTable OBJECT-TYPE
                  SYNTAX  SEQUENCE OF X25OperEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "The operation parameters in use by the X.25
                          PLE."
                  ::= { x25 2 }

          x25OperEntry OBJECT-TYPE
                  SYNTAX  X25OperEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "Entries of x25OperTable."
                  INDEX { x25OperIndex }
                  ::= { x25OperTable 1 }

          X25OperEntry ::= SEQUENCE {
                  x25OperIndex
                          IfIndexType,
                  x25OperInterfaceMode



Throop                                                         [Page 15]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          INTEGER,
                  x25OperMaxActiveCircuits
                          INTEGER,
                  x25OperPacketSequencing
                          INTEGER,
                  x25OperRestartTimer
                          PositiveInteger,
                  x25OperCallTimer
                          PositiveInteger,
                  x25OperResetTimer
                          PositiveInteger,
                  x25OperClearTimer
                          PositiveInteger,
                  x25OperWindowTimer
                          PositiveInteger,
                  x25OperDataRxmtTimer
                          PositiveInteger,
                  x25OperInterruptTimer
                          PositiveInteger,
                  x25OperRejectTimer
                          PositiveInteger,
               x25OperRegistrationRequestTimer
                          PositiveInteger,
                  x25OperMinimumRecallTimer
                          PositiveInteger,
                  x25OperRestartCount
                          INTEGER,
                  x25OperResetCount
                          INTEGER,
                  x25OperClearCount
                          INTEGER,
                  x25OperDataRxmtCount
                          INTEGER,
                  x25OperRejectCount
                          INTEGER,
                  x25OperRegistrationRequestCount
                          INTEGER,
                  x25OperNumberPVCs
                          INTEGER,
                  x25OperDefCallParamId
                          OBJECT IDENTIFIER,
                  x25OperLocalAddress
                          X121Address,
                  x25OperDataLinkId
                          OBJECT IDENTIFIER,
                  x25OperProtocolVersionSupported
                          OBJECT IDENTIFIER
                  }



Throop                                                         [Page 16]

RFC 1382                 X.25 Packet Layer MIB             November 1992


          x25OperIndex OBJECT-TYPE
                  SYNTAX  IfIndexType
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The ifIndex value for the X.25 interface."
                  ::= { x25OperEntry 1 }

          x25OperInterfaceMode OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  dte (1),
                                  dce (2),
                                  dxe (3)
                          }
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                  "Identifies DCE/DTE mode in which the
                          interface operates.  A value of dxe
                          indicates the role will be determined by XID
                          negotiation at the Link Layer and that
                          negotiation has not yet taken place."
                  REFERENCE "10733 5.9 interfaceMode"
                  ::= { x25OperEntry 2 }

          x25OperMaxActiveCircuits        OBJECT-TYPE
                  SYNTAX  INTEGER (0..4096)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "Maximum number of circuits this PLE can
                          support."
                  REFERENCE "10733 5.9 maxActiveCircuits
                          See ISO 8208, Section 3.7"
                  ::= { x25OperEntry 3 }

          x25OperPacketSequencing OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  modulo8 (1),
                                  modulo128 (2)
                          }
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The modulus of the packet sequence number
                          space."
                  REFERENCE "10733 extendedPacketSequencing;
                          See ISO 8208    Section 7.1.1"



Throop                                                         [Page 17]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ::= { x25OperEntry 4 }

          x25OperRestartTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The T20 restart timer in milliseconds."
                  REFERENCE "10733 5.9 restartTime;
                          See ISO 8208    Section 4.1, table 26"
                  ::= { x25OperEntry 5 }

          x25OperCallTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The T21 Call timer in milliseconds."
                  REFERENCE "10733 callTime;
                          See ISO 8208 Section 5.2.1, table 26"
                  ::= { x25OperEntry 6 }

          x25OperResetTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The T22 Reset timer in milliseconds."
                  REFERENCE "10733 resetTime;
                          See ISO 8208    Section 8.1, table 26"
                  ::= { x25OperEntry 7 }

          x25OperClearTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The T23 Clear timer in milliseconds."
                  REFERENCE "10733 clearTime;
                          See ISO 8208 Section 5.5.1, table 26"
                  ::= { x25OperEntry 8 }

          x25OperWindowTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The T24 window status transmission timer



Throop                                                         [Page 18]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          milliseconds.  A value of 2147483647
                          indicates no window timer in use."
                  REFERENCE "10733 5.10.1 windowTime (opt);
                          See ISO 8208 Section 11.2.2, table 26"
                  ::= { x25OperEntry 9 }

          x25OperDataRxmtTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The T25 Data Retransmission timer in
                          milliseconds.  A value of 2147483647
                          indicates no data retransmission timer in
                          use."
                  REFERENCE "10733 5.10.1 dataRetransmissionTime (opt);
                          See ISO 8208 Section 11.2.1, table 26"
                  ::= { x25OperEntry 10 }

          x25OperInterruptTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The T26 Interrupt timer in milliseconds.  A
                          value of 2147483647 indicates interrupts are
                          not being used."
                  REFERENCE "10733 interruptTime;
                          See ISO 8208 Section 6.8.1, table 26"
                  ::= { x25OperEntry 11 }

          x25OperRejectTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The T27 Reject retransmission timer in
                          milliseconds.  A value of 2147483647
                          indicates no reject timer in use."
                  REFERENCE "10733 5.10.1 dataRejectTime (opt);
                          See ISO 8208 Section 13.4.1, table 26"
                  ::= { x25OperEntry 12 }

          x25OperRegistrationRequestTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION



Throop                                                         [Page 19]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          "The T28 registration timer in milliseconds.
                          A value of 2147483647 indicates no
                          registration timer in use."
                  REFERENCE "10733 5.8.1 registrationRequestTime (opt);
                          See ISO 8208    Section 13.1.1.1, table 26"
                  ::= { x25OperEntry 13 }

          x25OperMinimumRecallTimer OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "Minimum time interval between unsuccessful
                          call attempts in milliseconds."
                  REFERENCE "10733 5.9 minimum RecallTimer"
                  ::= { x25OperEntry 14 }

          x25OperRestartCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The R20 restart retransmission count."
                  REFERENCE "10733 5.9 restartCount
                          See ISO 8208    Section 4.1, table 27"
                  ::= { x25OperEntry 15 }

          x25OperResetCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The r22 Reset retransmission count."
                  REFERENCE "10733 resetCount;
                          See section ISO 8208 8.1, table 27"
                  ::= { x25OperEntry 16 }

          x25OperClearCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The r23 Clear retransmission count."
                  REFERENCE "10733 clearCount;
                          See ISO 8208 Section 5.5.1, table 27"
                  ::= { x25OperEntry 17 }

          x25OperDataRxmtCount OBJECT-TYPE



Throop                                                         [Page 20]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The R25 Data retransmission count.  This
                          value is undefined if the
                          x25OperDataRxmtTimer indicates no timer in
                          use."
                  REFERENCE "10733 5.10.1 dataRetransmissionCount (opt);
                          See ISO 8208 Section 11.2.1, table 27"
                  ::= { x25OperEntry 18 }

          x25OperRejectCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The R27 reject retransmission count.  This
                          value is undefined if the x25OperRejectTimer
                          indicates no timer in use."
                  REFERENCE "10733 5.10.1 dataRejectCount (opt)"
                  ::= { x25OperEntry 19 }

          x25OperRegistrationRequestCount OBJECT-TYPE
                  SYNTAX  INTEGER (0..65535)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The R28 Registration retransmission Count.
                          This value is undefined if the
                          x25OperREgistrationRequestTimer indicates no
                          timer in use."
                  REFERENCE "10733 5.8.1 registrationRequestCount (opt);
                          See ISO 8208    Section 13.1.1.1, table 27"
                  ::= { x25OperEntry 20 }

          x25OperNumberPVCs OBJECT-TYPE
                  SYNTAX  INTEGER (0..4096)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of PVC configured for this PLE.
                          The PVCs use channel numbers from 1 to this
                          number."
                  ::= { x25OperEntry 21 }

          x25OperDefCallParamId OBJECT-TYPE
                  SYNTAX  OBJECT IDENTIFIER



Throop                                                         [Page 21]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "This identifies the instance of the
                          x25CallParmIndex for the entry in the
                          x25CallParmTable that contains the default
                          call parameters for this PLE."
                  ::= { x25OperEntry 22 }

          x25OperLocalAddress OBJECT-TYPE
                  SYNTAX  X121Address
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The local address for this PLE subnetwork.
                          A zero length address maybe returned by PLEs
                          that only support PVCs."
                  REFERENCE "10733 5.9 localDTEAddress"
                  ::= { x25OperEntry 23 }

          x25OperDataLinkId OBJECT-TYPE
                  SYNTAX  OBJECT IDENTIFIER
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "This identifies the instance of the index
                          object in the first table of the most device
                          specific MIB for the interface used by this
                          PLE."
                  ::= { x25OperEntry 24 }

          x25OperProtocolVersionSupported OBJECT-TYPE
                  SYNTAX  OBJECT IDENTIFIER
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "Identifies the version of the X.25 protocol
                          this interface supports.  Object identifiers
                          for common versions are defined below in the
                          x25ProtocolVersion subtree."
                  REFERENCE "10733 5.9 protocolVersionSupported"
                  ::= { x25OperEntry 25 }


          --      MIB-II also provides:

          -- ifDescr:
          -- On an X.25 interface this must include sufficient



Throop                                                         [Page 22]

RFC 1382                 X.25 Packet Layer MIB             November 1992


          -- information to enable the system's administrator
          -- to determine the appropriate configuration
          -- information on a system having multiple X.25
          -- subnetworks.

          -- ifType: ddn-x25 or rfc877-x25
          --      an interface of type ddn-x25 will use an algorithm to
          --      translate between X.121 address and IP addresses.
          --      An interface of type rfc877-x25 will use a
          --      configuration table to translate between X.121
          --      addresses and IP addresses.

          -- ifMtu: the maximum PDU a higher layer can pass to X.25 or
          -- receive from X.25

          -- ifSpeed:
          -- This will be the value of the local clock for this line.
          -- A value of zero indicates external clocking.

          -- ifAdminStatus:

          -- ifOperStatus

          -- ifLastChange


          -- ###########################################################
          --            X.25 Statistics Table
          -- ###########################################################

          x25StatTable OBJECT-TYPE
                  SYNTAX  SEQUENCE OF X25StatEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "Statistics information about this X.25
                          PLE."
                  ::= { x25 3 }

          x25StatEntry OBJECT-TYPE
                  SYNTAX  X25StatEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                           "Entries of the x25StatTable."
                           INDEX { x25StatIndex }
                  ::= { x25StatTable 1 }




Throop                                                         [Page 23]

RFC 1382                 X.25 Packet Layer MIB             November 1992


          X25StatEntry ::= SEQUENCE {
                  x25StatIndex
                          IfIndexType,
                  x25StatInCalls
                          Counter,
                  x25StatInCallRefusals
                          Counter,
                  x25StatInProviderInitiatedClears
                          Counter,
                  x25StatInRemotelyInitiatedResets
                          Counter,
                  x25StatInProviderInitiatedResets
                          Counter,
                  x25StatInRestarts
                          Counter,
                  x25StatInDataPackets
                          Counter,
                  x25StatInAccusedOfProtocolErrors
                          Counter,
                  x25StatInInterrupts
                          Counter,
                  x25StatOutCallAttempts
                          Counter,
                  x25StatOutCallFailures
                          Counter,
                  x25StatOutInterrupts
                          Counter,
                  x25StatOutDataPackets
                          Counter,
                  x25StatOutgoingCircuits
                          Gauge,
                  x25StatIncomingCircuits
                          Gauge,
                  x25StatTwowayCircuits
                          Gauge,
                  x25StatRestartTimeouts
                          Counter,
                  x25StatCallTimeouts
                          Counter,
                  x25StatResetTimeouts
                          Counter,
                  x25StatClearTimeouts
                          Counter,
                  x25StatDataRxmtTimeouts
                          Counter,
                  x25StatInterruptTimeouts
                          Counter,
                  x25StatRetryCountExceededs



Throop                                                         [Page 24]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          Counter,
                  x25StatClearCountExceededs
                          Counter
                  }

          x25StatIndex OBJECT-TYPE
                  SYNTAX  IfIndexType
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The ifIndex value for the X.25 interface."
                  ::= { x25StatEntry 1 }

          x25StatInCalls OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of incoming calls received."
                  ::= { x25StatEntry 2 }

          x25StatInCallRefusals OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of incoming calls refused.  This
                          includes calls refused by the PLE and by
                          higher layers.  This also includes calls
                          cleared because of restricted fast select."
                  ::= { x25StatEntry 3 }

          x25StatInProviderInitiatedClears        OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of clear requests with a cause
                          code other than DTE initiated."
                          REFERENCE "10733 providerInitiatedDisconnect"
                  ::= { x25StatEntry 4 }

          x25StatInRemotelyInitiatedResets        OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of reset requests received with



Throop                                                         [Page 25]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          cause code DTE initiated."
                  REFERENCE "10733 remotelyInitiatedResets"
                  ::= { x25StatEntry 5 }

          x25StatInProviderInitiatedResets        OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of reset requests received with
                          cause code other than DTE initiated."
                  REFERENCE "10733 ProviderInitiatedResets"
                  ::= { x25StatEntry 6 }

          x25StatInRestarts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of remotely initiated (including
                          provider initiated) restarts experienced by
                          the PLE excluding the restart associated
                          with bringing up the PLE interface.  This
                          only counts restarts received when the PLE
                          already has an established connection with
                          the remove PLE."
                  REFERENCE "10733 5.9 remotelyInitiatedRestarts"
                  ::= { x25StatEntry 7 }

          x25StatInDataPackets    OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of data packets received."
                          REFERENCE "10733 5.9 dataPacketsReceived."
                  ::= { x25StatEntry 8 }

          x25StatInAccusedOfProtocolErrors        OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of packets received containing a
                          procedure error cause code.  These include
                          clear, reset, restart, or diagnostic
                          packets."
                  REFERENCE "CD 10733 5.9 accusedOfProtocolError"



Throop                                                         [Page 26]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ::= { x25StatEntry 9 }

          x25StatInInterrupts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of interrupt packets received by
                          the PLE or over the PVC/VC."
                  REFERENCE "10733 interruptPacketsReceived"
                  ::= { x25StatEntry 10 }

          x25StatOutCallAttempts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of calls attempted."
                  REFERENCE "10733 5.9 callAttempts"
                  ::= { x25StatEntry 11 }

          x25StatOutCallFailures OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of call attempts which failed.
                          This includes calls that were cleared
                          because of restrictive fast select."
                  ::= { x25StatEntry 12 }

          x25StatOutInterrupts    OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of interrupt packets send by the
                          PLE or over the PVC/VC."
                  REFERENCE "10733 InterruptPacketsSent"
                  ::= { x25StatEntry 13 }

          x25StatOutDataPackets   OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of data packets sent by this
                          PLE."



Throop                                                         [Page 27]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  REFERENCE "10733 dataPacketSent"
                  ::= { x25StatEntry 14 }

          x25StatOutgoingCircuits OBJECT-TYPE
                  SYNTAX  Gauge
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of active outgoing circuits.
                          This includes call requests sent but not yet
                          confirmed.  This does not count PVCs."
                  ::= { x25StatEntry 15 }

          x25StatIncomingCircuits OBJECT-TYPE
                  SYNTAX  Gauge
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of active Incoming Circuits.
                          This includes call indications received but
                          not yet acknowledged.  This does not count
                          PVCs."
                  ::= { x25StatEntry 16 }

          x25StatTwowayCircuits   OBJECT-TYPE
                  SYNTAX  Gauge
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                  "The number of active two-way Circuits.
                          This includes call requests sent but not yet
                          confirmed.  This does not count PVCs."
                  ::= { x25StatEntry 17 }

          x25StatRestartTimeouts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the T20 restart timer
                          expired."
                  REFERENCE "10733 5.9 restartTimeouts"
                  ::= { x25StatEntry 18 }

          x25StatCallTimeouts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory



Throop                                                         [Page 28]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  DESCRIPTION
                          "The number of times the T21 call timer
                          expired."
                  REFERENCE "10733 5.9 callTimeouts"
                  ::= { x25StatEntry 19 }

          x25StatResetTimeouts    OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the T22 reset timer
                          expired."
                  REFERENCE "10733 5.9 resetTimeouts"
                  ::= { x25StatEntry 20 }

          x25StatClearTimeouts    OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the T23 clear timer
                          expired."
                  REFERENCE "10733 5.9 clearTimeouts"
                  ::= { x25StatEntry 21 }

          x25StatDataRxmtTimeouts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the T25 data timer
                          expired."
                  REFERENCE "10733 5.9 dataRetransmissionsTimerExpiries"
                  ::= { x25StatEntry 22 }

          x25StatInterruptTimeouts        OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the T26 interrupt timer
                          expired."
                  REFERENCE "10733 5.9 interruptTimerExpires"
                  ::= { x25StatEntry 23 }

          x25StatRetryCountExceededs OBJECT-TYPE
                  SYNTAX  Counter



Throop                                                         [Page 29]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times a retry counter was
                          exhausted."
                  REFERENCE "10733 5.9 retryCountsExceeded"
                  ::= { x25StatEntry 24 }

          x25StatClearCountExceededs OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the R23 clear count was
                          exceeded."
                  REFERENCE "10733 5.9 clearCountsExceeded"
                  ::= { x25StatEntry 25 }


          --      MIB-II also contains:

          -- ifInOctets: Number of data octets delivered to upper
          -- layer entities.

          -- ifInUcastPkts: Number of packets with a clear M-bit
          -- delivered to higher layer entities.

          -- ifDiscards: Number of packets dropped for lack of buffering

          -- ifInErrors: Number of packets received containing errors
            -- REFERENCE ProtocolErrorsDetectedLocally

          -- ifInUnknownProtos: Number of packets with unknown circuit
          -- identifier.

          -- ifOutOctets: Number of data octets delivered by
          --      X.25 to upper layers.

          -- ifOutUcastPkts: Number of packets with a clear M-bit
          -- received from higher layer entities.


          -- ###########################################################
          --                    X.25 Channel Table
          -- ###########################################################

          x25ChannelTable OBJECT-TYPE
                  SYNTAX  SEQUENCE OF X25ChannelEntry



Throop                                                         [Page 30]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "These objects contain information about the
                          channel number configuration in an X.25 PLE.
                          These values are the configured values.
                          changes in these values after the interfaces
                          has started may not be reflected in the
                          operating PLE."
                  REFERENCE "See ISO 8208, Section 3.7"
                  ::= { x25 4 }

          x25ChannelEntry OBJECT-TYPE
                  SYNTAX  X25ChannelEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "Entries of x25ChannelTable."
                  REFERENCE "This provides the information available
                          in 10733 logicalChannelAssignments."
                  INDEX { x25ChannelIndex }
                  ::= { x25ChannelTable 1    }

          X25ChannelEntry ::= SEQUENCE {
                  x25ChannelIndex
                          IfIndexType,
                  x25ChannelLIC
                          INTEGER,
                  x25ChannelHIC
                          INTEGER,
                  x25ChannelLTC
                          INTEGER,
                  x25ChannelHTC
                          INTEGER,
                  x25ChannelLOC
                          INTEGER,
                  x25ChannelHOC
                          INTEGER
                  }

          x25ChannelIndex OBJECT-TYPE
                  SYNTAX  IfIndexType
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The ifIndex value for the X.25 Interface."
                  ::= { x25ChannelEntry 1 }




Throop                                                         [Page 31]

RFC 1382                 X.25 Packet Layer MIB             November 1992


          x25ChannelLIC OBJECT-TYPE
                  SYNTAX  INTEGER (0..4095)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Lowest Incoming channel."
                  ::= { x25ChannelEntry 2 }

          x25ChannelHIC OBJECT-TYPE
                  SYNTAX  INTEGER (0..4095)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Highest Incoming channel.  A value of zero
                          indicates no channels in this range."
                  ::= { x25ChannelEntry 3 }

          x25ChannelLTC OBJECT-TYPE
                  SYNTAX  INTEGER (0..4095)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Lowest Two-way channel."
                  ::= { x25ChannelEntry 4 }

          x25ChannelHTC OBJECT-TYPE
                  SYNTAX  INTEGER (0..4095)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Highest Two-way channel.  A value of zero
                          indicates no channels in this range."
                  ::= { x25ChannelEntry 5 }

          x25ChannelLOC OBJECT-TYPE
                  SYNTAX  INTEGER (0..4095)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Lowest outgoing channel."
                  ::= { x25ChannelEntry 6 }

          x25ChannelHOC OBJECT-TYPE
                  SYNTAX  INTEGER (0..4095)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Highest outgoing channel.  A value of zero



Throop                                                         [Page 32]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          indicates no channels in this range."
                  ::= { x25ChannelEntry 7 }




          -- ###########################################################
          --          X25 Per Circuits Information Table
          -- ###########################################################

          x25CircuitTable OBJECT-TYPE
                  SYNTAX  SEQUENCE OF X25CircuitEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "These objects contain general information
                          about a specific circuit of an X.25 PLE."
                  ::= { x25 5 }

          x25CircuitEntry OBJECT-TYPE
                  SYNTAX  X25CircuitEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "Entries of x25CircuitTable."
                  INDEX { x25CircuitIndex,
                          x25CircuitChannel }
                  ::= { x25CircuitTable 1 }

          X25CircuitEntry ::= SEQUENCE {
                  x25CircuitIndex
                          IfIndexType,
                  x25CircuitChannel
                          INTEGER,
                  x25CircuitStatus
                          INTEGER,
                  x25CircuitEstablishTime
                          TimeTicks,
                  x25CircuitDirection
                          INTEGER,
                  x25CircuitInOctets
                          Counter,
                  x25CircuitInPdus
                          Counter,
                  x25CircuitInRemotelyInitiatedResets
                          Counter,
                  x25CircuitInProviderInitiatedResets
                          Counter,



Throop                                                         [Page 33]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  x25CircuitInInterrupts
                          Counter,
                  x25CircuitOutOctets
                          Counter,
                  x25CircuitOutPdus
                          Counter,
                  x25CircuitOutInterrupts
                          Counter,
                  x25CircuitDataRetransmissionTimeouts
                          Counter,
                  x25CircuitResetTimeouts
                          Counter,
                  x25CircuitInterruptTimeouts
                          Counter,
                  x25CircuitCallParamId
                          OBJECT IDENTIFIER,
                  x25CircuitCalledDteAddress
                          X121Address,
                  x25CircuitCallingDteAddress
                          X121Address,
                  x25CircuitOriginallyCalledAddress
                          X121Address,
                  x25CircuitDescr
                          DisplayString
                  }

          x25CircuitIndex OBJECT-TYPE
                  SYNTAX  IfIndexType
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The ifIndex value for the X.25 Interface."
                  ::= { x25CircuitEntry 1 }

          x25CircuitChannel OBJECT-TYPE
                  SYNTAX  INTEGER (0..4095)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The channel number for this circuit."
                  ::= { x25CircuitEntry 2 }

          x25CircuitStatus OBJECT-TYPE
                  SYNTAX  INTEGER {               -- state table states
                                  invalid (1),
                                  closed (2),             -- (p1)
                                  calling (3),            -- (p2,p3,p5)
                                  open (4),               -- (p4)



Throop                                                         [Page 34]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                                  clearing (5),           -- (p6,p7)
                                  pvc (6),
                                  pvcResetting (7),
                                  startClear (8),         -- Close cmd
                                  startPvcResetting (9),  -- Reset cmd
                                  other (10)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "This object reports the current status of
                          the circuit.

                          An existing instance of this object can only
                          be set to startClear, startPvcResetting, or
                          invalid.  An instance with the value calling
                          or open can only be set to startClear and
                          that action will start clearing the circuit.
                          An instance with the value PVC can only be
                          set to startPvcResetting or invalid and that
                          action resets the PVC or deletes the circuit
                          respectively.  The values startClear or
                          startPvcResetting will never be returned by
                          an agent.  An attempt to set the status of
                          an existing instance to a value other than
                          one of these values will result in an error.

                          A non-existing instance can be set to PVC to
                          create a PVC if the implementation supports
                          dynamic creation of PVCs.  Some
                          implementations may only allow creation and
                          deletion of PVCs if the interface is down.
                          Since the instance identifier will supply
                          the PLE index and the channel number,
                          setting this object alone supplies
                          sufficient information to create the
                          instance.  All the DEFVAL clauses for the
                          other objects of this table are appropriate
                          for creating a PVC; PLEs creating entries
                          for placed or accepted calls will use values
                          appropriate for the call rather than the
                          value of the DEFVAL clause.  Two managers
                          trying to create the same PVC can determine
                          from the return code which manager succeeded
                          and which failed (the failing manager fails
                          because it can not set a value of PVC for an
                          existing object).




Throop                                                         [Page 35]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          An entry in the closed or invalid state may
                          be deleted or reused at the agent's
                          convence.  If the entry is kept in the
                          closed state, the values of the parameters
                          associated with the entry must be correct.
                          Closed implies the values in the circuit
                          table are correct.

                          The value of invalid indicates the other
                          values in the table are invalid.  Many
                          agents may never return a value of invalid
                          because they dynamically allocate and free
                          unused table entries.  An agent for a
                          statically configured systems can return
                          invalid to indicate the entry has not yet
                          been used so the counters contain no
                          information."
                  REFERENCE "See ISO 8208,
                                  table 33 for (p<n>) state table"
                  ::= { x25CircuitEntry 3 }

          x25CircuitEstablishTime OBJECT-TYPE
                  SYNTAX  TimeTicks
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The value of sysUpTime when the channel was
                          associated with this circuit.  For outgoing
                          SVCs, this is the time the first call packet
                          was sent.  For incoming SVCs, this is the
                          time the call indication was received.  For
                          PVCs this is the time the PVC was able to
                          pass data to a higher layer entity without
                          loss of data."
                  ::= { x25CircuitEntry 4 }

          x25CircuitDirection OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  incoming (1),
                                  outgoing (2),
                                  pvc (3)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The direction of the call that established
                          this circuit."
                  REFERENCE "10733 direction"



Throop                                                         [Page 36]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  DEFVAL { pvc }
                  ::= { x25CircuitEntry 5 }

                          -- X25 Circuit data flow statistics

          x25CircuitInOctets OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of octets of user data delivered
                          to upper layer."
                  REFERENCE "5.11 octetsReceivedCounter"
                  ::= { x25CircuitEntry 6 }

          x25CircuitInPdus OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of PDUs received for this
                          circuit."
                  REFERENCE "10733 5.11 dataPacketsReceived"
                  ::= { x25CircuitEntry 7 }

          x25CircuitInRemotelyInitiatedResets OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of Resets received for this
                          circuit with cause code of DTE initiated."
                  REFERENCE "10733 remotelyInitiatedResets"
                  ::= { x25CircuitEntry 8 }

          x25CircuitInProviderInitiatedResets OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of Resets received for this
                          circuit with cause code other than DTE
                          initiated."
                  REFERENCE "10733 ProviderInitiatedResets"
                  ::= { x25CircuitEntry 9 }

          x25CircuitInInterrupts OBJECT-TYPE
                  SYNTAX  Counter



Throop                                                         [Page 37]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of interrupt packets received
                          for this circuit."
                  REFERENCE "10733 interruptPacketsReceived"
                  ::= { x25CircuitEntry 10 }

          x25CircuitOutOctets OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of octets of user data sent for
                          this circuit."
                  REFERENCE "10733 5.11 octetsSentCounter"
                  ::= { x25CircuitEntry 11 }

          x25CircuitOutPdus OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of PDUs sent for this circuit."
                  REFERENCE "10733 5.11 dataPacketsSent"
                  ::= { x25CircuitEntry 12 }

          x25CircuitOutInterrupts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of interrupt packets sent on
                          this circuit."
                  REFERENCE "10733 interruptPacketsSent"
                  ::= { x25CircuitEntry 13 }


                          -- X25 circuit timer statistics

          x25CircuitDataRetransmissionTimeouts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the T25 data
                          retransmission timer expired for this
                          circuit."



Throop                                                         [Page 38]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  REFERENCE "10733 5.11 dataRetransmissionTimerExpiries"
                  ::= { x25CircuitEntry 14 }

          x25CircuitResetTimeouts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the T22 reset timer
                          expired for this circuit."
                  REFERENCE "10733 5.11 resetTimeouts"
                  ::= { x25CircuitEntry 15 }

          x25CircuitInterruptTimeouts OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of times the T26 Interrupt timer
                          expired for this circuit."
                  REFERENCE "10733 interruptTimerExpiries"
                  ::= { x25CircuitEntry 16 }

          x25CircuitCallParamId OBJECT-TYPE
                  SYNTAX  OBJECT IDENTIFIER
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "This identifies the instance of the
                          x25CallParmIndex for the entry in the
                          x25CallParmTable which contains the call
                          parameters in use with this circuit.  The
                          entry referenced must contain the values
                          that are currently in use by the circuit
                          rather than proposed values.  A value of
                          NULL indicates the circuit is a PVC or is
                          using all the default parameters."
                  DEFVAL { {0 0} }
                  ::= { x25CircuitEntry 17 }

          x25CircuitCalledDteAddress OBJECT-TYPE
                  SYNTAX  X121Address
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "For incoming calls, this is the called
                          address from the call indication packet.
                          For outgoing calls, this is the called



Throop                                                         [Page 39]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          address from the call confirmation packet.
                          This will be zero length for PVCs."
                  REFERENCE "10733 calledDTEAddress"
                  DEFVAL { ''h }
                  ::= { x25CircuitEntry 18 }

          x25CircuitCallingDteAddress OBJECT-TYPE
                  SYNTAX  X121Address
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "For incoming calls, this is the calling
                          address from the call indication packet.
                          For outgoing calls, this is the calling
                          address from the call confirmation packet.
                          This will be zero length for PVCs."
                  REFERENCE "10733 callingDTEAddress"
                  DEFVAL { ''h }
                  ::= { x25CircuitEntry 19 }

          x25CircuitOriginallyCalledAddress OBJECT-TYPE
                  SYNTAX  X121Address
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "For incoming calls, this is the address in
                          the call Redirection or Call Deflection
                          Notification facility if the call was
                          deflected or redirected, otherwise it will
                          be called address from the call indication
                          packet.  For outgoing calls, this is the
                          address from the call request packet.  This
                          will be zero length for PVCs."
                  REFERENCE "10733 originallyCalledAddress"
                  DEFVAL { ''h }
                  ::= { x25CircuitEntry 20 }

          x25CircuitDescr OBJECT-TYPE
                  SYNTAX  DisplayString (SIZE (0..255))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "A descriptive string associated with this
                          circuit.  This provides a place for the
                          agent to supply any descriptive information
                          it knows about the use or owner of the
                          circuit.  The agent may return the process
                          identifier and user name for the process



Throop                                                         [Page 40]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          using the circuit.  Alternative the agent
                          may return the name of the configuration
                          entry that caused a bridge to establish the
                          circuit.  A zero length value indicates the
                          agent doesn't have any additional
                          information."
                  DEFVAL { ''h }
                  ::= { x25CircuitEntry 21 }



          -- ###########################################################
          --              The Cleared Circuit Table
          -- ###########################################################

          x25ClearedCircuitEntriesRequested OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The requested number of entries for the
                          agent to keep in the x25ClearedCircuit
                          table."
                  ::= { x25 6 }

          x25ClearedCircuitEntriesGranted OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The actual number of entries the agent will
                          keep in the x25ClearedCircuit Table."
                  ::= { x25 7 }

          x25ClearedCircuitTable  OBJECT-TYPE
                  SYNTAX SEQUENCE OF      X25ClearedCircuitEntry
                  ACCESS not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "A table of entries about closed circuits.
                          Entries must be made in this table whenever
                          circuits are closed and the close request or
                          close indication packet contains a clearing
                          cause other than DTE Originated or a
                          Diagnostic code field other than Higher
                          Layer Initiated disconnection-normal.  An
                          agent may optionally make entries for normal
                          closes (to record closing facilities or



Throop                                                         [Page 41]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          other information).

                          Agents will delete the oldest entry in the
                          table when adding a new entry would exceed
                          agent resources.  Agents are required to
                          keep the last entry put in the table and may
                          keep more entries.  The object
                          x25OperClearEntriesGranted returns the
                          maximum number of entries kept in the
                          table."
                  REFERENCE "See ISO 8208 Section 12.2.3.1.1
                                  and 12.2.3.1.2"
                  ::= { x25 8 }

          x25ClearedCircuitEntry  OBJECT-TYPE
                  SYNTAX  X25ClearedCircuitEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "Information about a cleared circuit."
                  INDEX { x25ClearedCircuitIndex }
                  ::= { x25ClearedCircuitTable 1 }

          X25ClearedCircuitEntry ::= SEQUENCE {
                  x25ClearedCircuitIndex
                          PositiveInteger,
                  x25ClearedCircuitPleIndex
                          IfIndexType,
                  x25ClearedCircuitTimeEstablished
                          TimeTicks,
                  x25ClearedCircuitTimeCleared
                          TimeTicks,
                  x25ClearedCircuitChannel
                          INTEGER,
                  x25ClearedCircuitClearingCause
                          INTEGER,
                  x25ClearedCircuitDiagnosticCode
                          INTEGER,
                  x25ClearedCircuitInPdus
                          Counter,
                  x25ClearedCircuitOutPdus
                          Counter,
                  x25ClearedCircuitCalledAddress
                          X121Address,
                  x25ClearedCircuitCallingAddress
                          X121Address,
                  x25ClearedCircuitClearFacilities
                          OCTET STRING



Throop                                                         [Page 42]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  }

          x25ClearedCircuitIndex OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "An index that uniquely distinguishes one
                          entry in the clearedCircuitTable from
                          another.  This index will start at
                          2147483647 and will decrease by one for each
                          new entry added to the table.  Upon reaching
                          one, the index will reset to 2147483647.
                          Because the index starts at 2147483647 and
                          decreases, a manager may do a getnext on
                          entry zero and obtain the most recent entry.
                          When the index has the value of 1, the next
                          entry will delete all entries in the table
                          and that entry will be numbered 2147483647."
                  ::= { x25ClearedCircuitEntry 1 }

          x25ClearedCircuitPleIndex OBJECT-TYPE
                  SYNTAX  IfIndexType
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The value of ifIndex for the PLE which
                          cleared the circuit that created the entry."
                  ::= { x25ClearedCircuitEntry 2 }

          x25ClearedCircuitTimeEstablished OBJECT-TYPE
                  SYNTAX  TimeTicks
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The value of sysUpTime when the circuit was
                          established.  This will be the same value
                          that was in the x25CircuitEstablishTime for
                          the circuit."
                  ::= { x25ClearedCircuitEntry 3 }

          x25ClearedCircuitTimeCleared OBJECT-TYPE
                  SYNTAX  TimeTicks
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The value of sysUpTime when the circuit was
                          cleared.  For locally initiated clears, this



Throop                                                         [Page 43]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          will be the time when the clear confirmation
                          was received.  For remotely initiated
                          clears, this will be the time when the clear
                          indication was received."
                  ::= { x25ClearedCircuitEntry 4 }

          x25ClearedCircuitChannel OBJECT-TYPE
                  SYNTAX  INTEGER (0..4095)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The channel number for the circuit that was
                          cleared."
                  ::= { x25ClearedCircuitEntry 5 }

          x25ClearedCircuitClearingCause OBJECT-TYPE
                  SYNTAX  INTEGER (0..255)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The Clearing Cause from the clear request
                          or clear indication packet that cleared the
                          circuit."
                  REFERENCE "See ISO 8208 Section 12.2.3.1.1"
                  ::= { x25ClearedCircuitEntry 6 }

          x25ClearedCircuitDiagnosticCode OBJECT-TYPE
                  SYNTAX  INTEGER (0..255)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The Diagnostic Code from the clear request
                          or clear indication packet that cleared the
                          circuit."
                  REFERENCE "See ISO 8208 Section 12.2.3.1.2"
                  ::= { x25ClearedCircuitEntry 7 }

          x25ClearedCircuitInPdus OBJECT-TYPE
                  SYNTAX  Counter
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of PDUs received on the
                          circuit."
                  ::= { x25ClearedCircuitEntry 8 }

          x25ClearedCircuitOutPdus OBJECT-TYPE
                  SYNTAX  Counter



Throop                                                         [Page 44]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of PDUs transmitted on the
                          circuit."
                  ::= { x25ClearedCircuitEntry 9 }

          x25ClearedCircuitCalledAddress OBJECT-TYPE
                  SYNTAX  X121Address
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The called address from the cleared
                          circuit."
                  ::= { x25ClearedCircuitEntry 10 }

          x25ClearedCircuitCallingAddress OBJECT-TYPE
                  SYNTAX  X121Address
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The calling address from the cleared
                          circuit."
                  ::= { x25ClearedCircuitEntry 11 }

          x25ClearedCircuitClearFacilities OBJECT-TYPE
                  SYNTAX  OCTET STRING (SIZE (0..109))
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The facilities field from the clear request
                          or clear indication packet that cleared the
                          circuit.  A size of zero indicates no
                          facilities were present."
                  ::= { x25ClearedCircuitEntry 12 }




          -- ###########################################################
          --                The Call Parameter Table
          -- ###########################################################

          x25CallParmTable OBJECT-TYPE
                  SYNTAX  SEQUENCE OF X25CallParmEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION



Throop                                                         [Page 45]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          "These objects contain the parameters that
                          can be varied between X.25 calls.  The
                          entries in this table are independent of the
                          PLE.  There exists only one of these tables
                          for the entire system.  The indexes for the
                          entries are independent of any PLE or any
                          circuit.  Other tables reference entries in
                          this table.  Entries in this table can be
                          used for default PLE parameters, for
                          parameters to use to place/answer a call,
                          for the parameters currently in use for a
                          circuit, or parameters that were used by a
                          circuit.

                          The number of references to a given set of
                          parameters can be found in the
                          x25CallParmRefCount object sharing the same
                          instance identifier with the parameters.
                          The value of this reference count also
                          affects the access of the objects in this
                          table.  An object in this table with the
                          same instance identifier as the instance
                          identifier of an x25CallParmRefCount must be
                          consider associated with that reference
                          count.  An object with an associated
                          reference count of zero can be written (if
                          its ACCESS clause allows it).  An object
                          with an associated reference count greater
                          than zero can not be written (regardless of
                          the ACCESS clause).  This ensures that a set
                          of call parameters being referenced from
                          another table can not be modified or changed
                          in a ways inappropriate for continued use by
                          that table."
                  ::= { x25 9 }

          x25CallParmEntry OBJECT-TYPE
                  SYNTAX  X25CallParmEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "Entries of x25CallParmTable."
                  INDEX { x25CallParmIndex }
                  ::= { x25CallParmTable 1 }

          X25CallParmEntry ::= SEQUENCE {
                  x25CallParmIndex
                          PositiveInteger,



Throop                                                         [Page 46]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  x25CallParmStatus
                          EntryStatus,
                  x25CallParmRefCount
                          PositiveInteger,
                  x25CallParmInPacketSize
                          INTEGER,
                  x25CallParmOutPacketSize
                          INTEGER,
                  x25CallParmInWindowSize
                          INTEGER,
                  x25CallParmOutWindowSize
                          INTEGER,
                  x25CallParmAcceptReverseCharging
                          INTEGER,
                  x25CallParmProposeReverseCharging
                          INTEGER,
                  x25CallParmFastSelect
                          INTEGER,
                  x25CallParmInThruPutClasSize
                          INTEGER,
                  x25CallParmOutThruPutClasSize
                          INTEGER,
                  x25CallParmCug
                          DisplayString,
                  x25CallParmCugoa
                          DisplayString,
                  x25CallParmBcug
                          DisplayString,
                  x25CallParmNui
                          OCTET STRING,
                  x25CallParmChargingInfo
                          INTEGER,
                  x25CallParmRpoa
                          DisplayString,
                  x25CallParmTrnstDly
                          INTEGER,
                  x25CallParmCallingExt
                          DisplayString,
                  x25CallParmCalledExt
                          DisplayString,
                  x25CallParmInMinThuPutCls
                          INTEGER,
                  x25CallParmOutMinThuPutCls
                          INTEGER,
                  x25CallParmEndTrnsDly
                          OCTET STRING,
                  x25CallParmPriority
                          OCTET STRING,



Throop                                                         [Page 47]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  x25CallParmProtection
                          DisplayString,
                  x25CallParmExptData
                          INTEGER,
                  x25CallParmUserData
                          OCTET STRING,
                  x25CallParmCallingNetworkFacilities
                          OCTET STRING,
                  x25CallParmCalledNetworkFacilities
                          OCTET STRING
                  }

          x25CallParmIndex OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "A value that distinguishes this entry from
                          another entry.  Entries in this table are
                          referenced from other objects which identify
                          call parameters.

                          It is impossible to know which other objects
                          in the MIB reference entries in the table by
                          looking at this table.  Because of this,
                          changes to parameters must be accomplished
                          by creating a new entry in this table and
                          then changing the referencing table to
                          identify the new entry.

                          Note that an agent will only use the values
                          in this table when another table is changed
                          to reference those values.  The number of
                          other tables that reference an index object
                          in this table can be found in
                          x25CallParmRefCount.  The value of the
                          reference count will affect the writability
                          of the objects as explained above.

                          Entries in this table which have a reference
                          count of zero maybe deleted at the convence
                          of the agent.  Care should be taken by the
                          agent to give the NMS sufficient time to
                          create a reference to newly created entries.

                          Should a Management Station not find a free
                          index with which to create a new entry, it
                          may feel free to delete entries with a



Throop                                                         [Page 48]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          reference count of zero.  However in doing
                          so the Management Station much realize it
                          may impact other Management Stations."
                  ::= { x25CallParmEntry 1 }

          x25CallParmStatus OBJECT-TYPE
                  SYNTAX  EntryStatus
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The status of this call parameter entry.
                          See RFC 1271 for details of usage."
                  ::= { x25CallParmEntry 2 }

          x25CallParmRefCount OBJECT-TYPE
                  SYNTAX  PositiveInteger
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                          "The number of references know by a
                          management station to exist to this set of
                          call parameters.  This is the number of
                          other objects that have returned a value of,
                          and will return a value of, the index for
                          this set of call parameters.  Examples of
                          such objects are the x25AdmnDefCallParamId,
                          x25OperDataLinkId, or x25AdmnDefCallParamId
                          objects defined above."
                  ::= { x25CallParmEntry 3 }

          x25CallParmInPacketSize OBJECT-TYPE
                  SYNTAX  INTEGER (0..4096)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The maximum receive packet size in octets
                          for a circuit.  A size of zero for a circuit
                          means use the PLE default size.  A size of
                          zero for the PLE means use a default size of
                          128."
                  REFERENCE "10733 proposedPacketSize;
                          See ISO 8208 Section 15.2.2.1.1"
                  DEFVAL { 128 }
                  ::= { x25CallParmEntry 4 }

          x25CallParmOutPacketSize OBJECT-TYPE
                  SYNTAX  INTEGER (0..4096)
                  ACCESS  read-write



Throop                                                         [Page 49]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  STATUS  mandatory
                  DESCRIPTION
                          "The maximum transmit packet size in octets
                          for a circuit.  A size of zero for a circuit
                          means use the PLE default size.  A size of
                          zero for the PLE default means use a default
                          size of 128."
                  REFERENCE "10733 proposedPacketSize;
                          See ISO 8208 Section 15.2.2.1.1"
                  DEFVAL { 128 }
                  ::= { x25CallParmEntry 5 }

          x25CallParmInWindowSize OBJECT-TYPE
                  SYNTAX  INTEGER (0..127)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The receive window size for a circuit.  A
                          size of zero for a circuit means use the PLE
                          default size.  A size of zero for the PLE
                          default means use 2."
                  REFERENCE "10733 proposedWindowSize;
                          See ISO 8208 Section 15.2.2.1.2"
                  DEFVAL { 2 }
                  ::= { x25CallParmEntry 6 }

          x25CallParmOutWindowSize OBJECT-TYPE
                  SYNTAX  INTEGER (0..127)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The transmit window size for a circuit.  A
                          size of zero for a circuit means use the PLE
                          default size.  A size of zero for the PLE
                          default means use 2."
                  REFERENCE "10733 proposedWindowSize;
                          See ISO 8208 Section 15.2.2.1.2"
                  DEFVAL { 2 }
                  ::= { x25CallParmEntry 7 }

          x25CallParmAcceptReverseCharging OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  default (1),
                                  accept (2),
                                  refuse (3),
                                  neverAccept (4)
                          }
                  ACCESS  read-write



Throop                                                         [Page 50]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  STATUS  mandatory
                  DESCRIPTION
                          "An enumeration defining if the PLE will
                          accept or refuse charges.  A value of
                          default for a circuit means use the PLE
                          default value.  A value of neverAccept is
                          only used for the PLE default and indicates
                          the PLE will never accept reverse charging.
                          A value of default for a PLE default means
                          refuse."
                  REFERENCE "10733 acceptReverseCharging"
                  DEFVAL { refuse }
                  ::= { x25CallParmEntry 8 }

          x25CallParmProposeReverseCharging OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  default (1),
                                  reverse (2),
                                  local (3)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "An enumeration defining if the PLE should
                          propose reverse or local charging.  The
                          value of default for a circuit means use the
                          PLE default.  The value of default for the
                          PLE default means use local."
                  REFERENCE "10733 proposedPacketSize;
                          See ISO 8208 Section 15.2.2.6"
                  DEFVAL { local }
                  ::= { x25CallParmEntry 9 }

          x25CallParmFastSelect OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  default (1),
                                  notSpecified (2),
                                  fastSelect (3),
                                  restrictedFastResponse (4),
                                  noFastSelect (5),
                                  noRestrictedFastResponse (6)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "Expresses preference for use of fast select
                          facility.  The value of default for a
                          circuit is the PLE default.  A value of



Throop                                                         [Page 51]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          default for the PLE means noFastSelect.  A
                          value of noFastSelect or
                          noRestrictedFastResponse indicates a circuit
                          may not use fast select or restricted fast
                          response."
                  REFERENCE "10733 fastSelect;
                  Sec ISO 8208 Section 15.2.2.6"
                  DEFVAL { noFastSelect }
                  ::= { x25CallParmEntry 10 }

          x25CallParmInThruPutClasSize    OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  tcReserved1 (1),
                                  tcReserved2 (2),
                                  tc75 (3),
                                  tc150 (4),
                                  tc300 (5),
                                  tc600 (6),
                                  tc1200  (7),
                                  tc2400  (8),
                                  tc4800  (9),
                                  tc9600  (10),
                                  tc19200 (11),
                                  tc48000 (12),
                                  tc64000 (13),
                                  tcReserved14 (14),
                                  tcReserved15 (15),
                                  tcReserved0 (16),
                                  tcNone  (17),
                                  tcDefault (18)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The incoming throughput class to negotiate.
                          A value of tcDefault for a circuit means use
                          the PLE default.  A value of tcDefault for
                          the PLE default means tcNone.  A value of
                          tcNone means do not negotiate throughtput
                          class."
                  REFERENCE "See ISO 8208 Section 15.2.2.2, table 18"
                  DEFVAL { tcNone }
                  ::= { x25CallParmEntry 11 }

          x25CallParmOutThruPutClasSize   OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  tcReserved1 (1),
                                  tcReserved2 (2),



Throop                                                         [Page 52]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                                  tc75 (3),
                                  tc150 (4),
                                  tc300 (5),
                          tc600 (6),
                                  tc1200  (7),
                                  tc2400  (8),
                                  tc4800  (9),
                                  tc9600  (10),
                                  tc19200 (11),
                                  tc48000 (12),
                                  tc64000 (13),
                                  tcReserved14 (14),
                                  tcReserved15 (15),
                                  tcReserved0 (16),
                                  tcNone  (17),
                                  tcDefault (18)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The outgoing throughput class to negotiate.
                          A value of tcDefault for a circuit means use
                          the PLE default.  A value of tcDefault for
                          the PLE default means use tcNone.  A value
                          of tcNone means do not negotiate throughtput
                          class."
                  REFERENCE "See ISO 8208 Section 15.2.2.2, table 18"
                  DEFVAL { tcNone }
                  ::= { x25CallParmEntry 12 }

          x25CallParmCug  OBJECT-TYPE
                  SYNTAX  DisplayString (SIZE(0..4))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The Closed User Group to specify.  This
                          consists of two or four octets containing
                          the characters 0 through 9.  A zero length
                          string indicates no facility requested.  A
                          string length of three containing the
                          characters DEF for a circuit means use the
                          PLE default, (the PLE default parameter may
                          not reference an entry of DEF.)"
                  REFERENCE "See ISO 8208 Section 15.2.2.3"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 13 }

          x25CallParmCugoa        OBJECT-TYPE



Throop                                                         [Page 53]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  SYNTAX  DisplayString (SIZE(0..4))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The Closed User Group with Outgoing Access
                          to specify.  This consists of two or four
                          octets containing the characters 0 through
                          9.  A string length of three containing the
                          characters DEF for a circuit means use the
                          PLE default (the PLE default parameters may
                          not reference an entry of DEF).  A zero
                          length string indicates no facility
                          requested."
                  REFERENCE "See ISO 8208 Section 15.2.2.4"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 14 }

          x25CallParmBcug OBJECT-TYPE
                  SYNTAX  DisplayString (SIZE(0..3))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The Bilateral Closed User Group to specify.
                          This consists of two octets containing the
                          characters 0 through 9.  A string length of
                          three containing the characters DEF for a
                          circuit means use the PLE default (the PLE
                          default parameter may not reference an entry
                          of DEF).  A zero length string indicates no
                          facility requested."
                  REFERENCE "See ISO 8208 Section 15.2.2.5"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 15 }

          x25CallParmNui  OBJECT-TYPE
                  SYNTAX  OCTET STRING (SIZE(0..108))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The Network User Identifier facility.  This
                          is binary value to be included immediately
                          after the length field.  The PLE will supply
                          the length octet.  A zero length string
                          indicates no facility requested.  This value
                          is ignored for the PLE default parameters
                          entry."
                  REFERENCE "See ISO 8208 Section 15.2.2.7"
                  DEFVAL { ''h }



Throop                                                         [Page 54]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  ::= { x25CallParmEntry 16 }

          x25CallParmChargingInfo OBJECT-TYPE
                  SYNTAX INTEGER {
                                  default (1),
                                  noFacility (2),
                                  noChargingInfo (3),
                                  chargingInfo (4)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The charging Information facility.  A value
                          of default for a circuit means use the PLE
                          default.  The value of default for the
                          default PLE parameters means use noFacility.
                          The value of noFacility means do not include
                          a facility."
                  REFERENCE "See ISO 8208 Section 15.2.2.8"
                  DEFVAL { noFacility }
                  ::= { x25CallParmEntry 17 }

          x25CallParmRpoa OBJECT-TYPE
                  SYNTAX  DisplayString (SIZE(0..108))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The RPOA facility.  The octet string
                          contains n * 4 sequences of the characters
                          0-9 to specify a facility with n entries.
                          The octet string containing the 3 characters
                          DEF for a circuit specifies use of the PLE
                          default (the entry for the PLE default may
                          not contain DEF).  A zero length string
                          indicates no facility requested."
                  REFERENCE "See ISO 8208, section 15.2.2.9"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 18 }

          x25CallParmTrnstDly     OBJECT-TYPE
                  SYNTAX  INTEGER (0..65537)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The Transit Delay Selection and Indication
                          value.  A value of 65536 indicates no
                          facility requested.  A value of 65537 for a
                          circuit means use the PLE default (the PLE



Throop                                                         [Page 55]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          default parameters entry may not use the
                          value 65537).  The value 65535 may only be
                          used to indicate the value in use by a
                          circuit."
                  REFERENCE "See ISO 8208, Section 15.2.2.13"
                  DEFVAL { 65536 }
                  ::= { x25CallParmEntry 19 }


                  -- The following parameters are for CCITT facilities.

          x25CallParmCallingExt OBJECT-TYPE
                  SYNTAX  DisplayString (SIZE(0..40))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The Calling Extension facility.  This
                          contains one of the following:

                          A sequence of hex digits with the value to
                          be put in the facility. These digits will be
                          converted to binary by the agent and put in
                          the facility.  These octets do not include
                          the length octet.

                          A value containing the three character DEF
                          for a circuit means use the PLE default,
                          (the entry for the PLE default parameters
                          may not use the value DEF).

                          A zero length string indicates no facility
                          requested."
                  REFERENCE "See ISO 8208 Section 15.3.2.1"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 20 }

          x25CallParmCalledExt OBJECT-TYPE
                  SYNTAX  DisplayString (SIZE(0..40))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The Called Extension facility.  This
                          contains one of the following:

                          A sequence of hex digits with the value to
                          be put in the facility.  These digits will be
                          converted to binary by the agent and put in
                          the facility.  These octets do not include



Throop                                                         [Page 56]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          the length octet.

                          A value containing the three character DEF
                          for a circuit means use the PLE default,
                          (the entry for the PLE default parameters
                          may not use the value DEF).

                          A zero length string indicates no facility
                          requested."
                  REFERENCE "See ISO 8208 Section 15.3.2.2"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 21 }

          x25CallParmInMinThuPutCls       OBJECT-TYPE
                  SYNTAX  INTEGER (0..17)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The minimum input throughput Class.  A
                          value of 16 for a circuit means use the PLE
                          default (the PLE parameters entry may not
                          use this value).  A value of 17 indicates no
                          facility requested."
                  REFERENCE "See ISO 8208 Section 15.3.2.3"
                  DEFVAL { 17 }
                  ::= { x25CallParmEntry 22 }

          x25CallParmOutMinThuPutCls OBJECT-TYPE
                  SYNTAX  INTEGER (0..17)
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The minimum output throughput Class.  A
                          value of 16 for a circuit means use the PLE
                          default (the PLE parameters entry may not
                          use this value).  A value of 17 indicates no
                          facility requested."
                  REFERENCE "See ISO 8208 Section 15.3.2.3"
                  DEFVAL { 17 }
                  ::= { x25CallParmEntry 23 }

          x25CallParmEndTrnsDly OBJECT-TYPE
                  SYNTAX  OCTET STRING (SIZE(0..6))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The End-to-End Transit Delay to negotiate.
                          An octet string of length 2, 4, or 6



Throop                                                         [Page 57]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          contains the facility encoded as specified
                          in ISO/IEC 8208 section 15.3.2.4.  An octet
                          string of length 3 containing the three
                          character DEF for a circuit means use the
                          PLE default (the entry for the PLE default
                          can not contain the characters DEF).  A zero
                          length string indicates no facility
                          requested."
                  REFERENCE "See ISO 8208 Section 15.3.2.4"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 24 }

          x25CallParmPriority OBJECT-TYPE
                  SYNTAX  OCTET STRING (SIZE(0..6))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The priority facility to negotiate.  The
                          octet string encoded as specified in ISO/IEC
                          8208 section 15.3.2.5.  A zero length string
                          indicates no facility requested.  The entry
                          for the PLE default parameters must be zero
                          length."
                  REFERENCE "See ISO 8208 Section 15.3.2.5"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 25 }

          x25CallParmProtection OBJECT-TYPE
                  SYNTAX  DisplayString (SIZE(0..108))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "A string contains the following:
                          A hex string containing the value for the
                          protection facility.  This will be converted
                          from hex to the octets actually in the
                          packet by the agent.  The agent will supply
                          the length field and the length octet is not
                          contained in this string.

                          An string containing the 3 characters DEF
                          for a circuit means use the PLE default (the
                          entry for the PLE default parameters may not
                          use the value DEF).

                          A zero length string mean no facility
                          requested."
                  REFERENCE "See ISO 8208 Section 15.3.2.5"



Throop                                                         [Page 58]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 26 }

          x25CallParmExptData OBJECT-TYPE
                  SYNTAX  INTEGER {
                                  default (1),
                                  noExpeditedData (2),
                                  expeditedData (3)
                          }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The Expedited Data facility to negotiate.
                          A value of default for a circuit means use
                          the PLE default value.  The entry for the
                          PLE default parameters may not have the
                          value default."
                  REFERENCE "See ISO 8208 Section 15.3.2.7"
                  DEFVAL { noExpeditedData }
                  ::= { x25CallParmEntry 27 }

          x25CallParmUserData     OBJECT-TYPE
                  SYNTAX  OCTET STRING (SIZE (0..128))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The call user data as placed in the packet.
                          A zero length string indicates no call user
                          data.  If both the circuit call parameters
                          and the PLE default have call user data
                          defined, the data from the circuit call
                          parameters will be used.  If only the PLE
                          has data defined, the PLE entry will be
                          used.  If neither the circuit call
                          parameters or the PLE default entry has a
                          value, no call user data will be sent."
                  REFERENCE "See ISO 8208 Section 12.2.1.1.6, 12.2.1.2"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 28 }

          x25CallParmCallingNetworkFacilities     OBJECT-TYPE
                  SYNTAX  OCTET STRING (SIZE (0..108))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The calling network facilities.  The
                          facilities are encoded here exactly as
                          encoded in the call packet.  These



Throop                                                         [Page 59]

RFC 1382                 X.25 Packet Layer MIB             November 1992


                          facilities do not include the marker
                          facility code.

                          A zero length string in the entry for the
                          parameter to use when establishing a circuit
                          means use the PLE default.  A zero length
                          string in the entry for PLE default
                          parameters indicates no default facilities."
                  REFERENCE "See ISO 8206 Section 15.1, category b"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 29 }

          x25CallParmCalledNetworkFacilities      OBJECT-TYPE
                  SYNTAX  OCTET STRING (SIZE (0..108))
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                          "The called network facilities.  The
                          facilities are encoded here exactly as
                          encoded in the call packet.  These
                          facilities do not include the marker
                          facility code.

                          A zero length string in the entry for the
                          parameter to use when establishing a circuit
                          means use the PLE default.  A zero length
                          string in the entry for PLE default
                          parameters indicates no default facilities."
                  REFERENCE "See ISO 8206 Section 15.1, category c"
                  DEFVAL { ''h }
                  ::= { x25CallParmEntry 30 }

          -- ###########################################################
          --              X.25 Traps
          -- ###########################################################

          x25Restart      TRAP-TYPE
                  ENTERPRISE  x25
                  VARIABLES { x25OperIndex }
                  DESCRIPTION
                          "This trap means the X.25 PLE sent or
                          received a restart packet.  The restart that
                          brings up the link should not send a
                          x25Restart trap so the interface should send
                          a linkUp trap.  Sending this trap means the
                          agent does not send a linkDown and linkUp
                          trap."
                  ::= 1



Throop                                                         [Page 60]

RFC 1382                 X.25 Packet Layer MIB             November 1992


          x25Reset        TRAP-TYPE
                  ENTERPRISE  x25
                  VARIABLES { x25CircuitIndex,
                          x25CircuitChannel }
                  DESCRIPTION
                          "If the PLE sends or receives a reset, the
                          agent should send an x25Reset trap."
                  ::= 2


          -- ###########################################################
          --              X.25 Protocol Version Identifiers
          -- ###########################################################

          x25ProtocolVersion OBJECT IDENTIFIER
                  ::= { x25 10 }

                  -- X.25 CCITT 1976 version.
          x25protocolCcittV1976 OBJECT IDENTIFIER
                  ::= { x25ProtocolVersion 1 }

                  -- X.25 CCITT 1980 version.
          x25protocolCcittV1980 OBJECT IDENTIFIER
                  ::= { x25ProtocolVersion 2 }

                  -- X.25 CCITT 1984 version.
          x25protocolCcittV1984 OBJECT IDENTIFIER
                  ::= { x25ProtocolVersion 3 }

                  -- X.25 CCITT 1988 version.
          x25protocolCcittV1988 OBJECT IDENTIFIER
                  ::= { x25ProtocolVersion 4 }

                  -- X.25 1987 version of ISO 8208.
          x25protocolIso8208V1987 OBJECT IDENTIFIER
                  ::= { x25ProtocolVersion 5 }

                  -- X.25 1989 version of ISO 8208.
          x25protocolIso8208V1989 OBJECT IDENTIFIER
                  ::= { x25ProtocolVersion 6 }

          -- ###########################################################

          END







Throop                                                         [Page 61]

RFC 1382                 X.25 Packet Layer MIB             November 1992


5. Appendix: Revision History

          July 30 1992

          The July, 1992 release (Editor's Internal Reference Number
          2.14) made the following changes:

               The syntax of the index objects for tables that are
               congruent with the MIB-II ifTable were changed to
               ifIndexType.

               The x25CallParmRefCount object was added to the
               x25CallParmTable.

               The description of the x25CallParmTable and
               x25CallParmIndex objects were changed to only allow
               writing an entry with a zero reference count.

               A requirement for conformance was added after the
               definition of x25 in the ASN.1 definition.

          June 26 1992

          The June 29, 1992 release (Editor's Internal Reference Number
          2.12) made the following changes:

               The range of x25ChannelLIC was changed from (0..4096) to
               (0..4095).

               The range of x25ChannelHIC was changed from (0..4096) to
               (0..4095).

               The range of x25ChannelLTC was changed from (0..4096) to
               (0..4095).

               The range of x25ChannelHTC was changed from (0..4096) to
               (0..4095).

               The range of x25ChannelLOC was changed from (0..4096) to
               (0..4095).

               The range of x25ChannelHOC was changed from (0..4096) to
               (0..4095).

               The range of x25CircuitChannel was changed from (1..4096)
               to (0..4095).

               The range of x25ClearedCircuitChannel was changed from



Throop                                                         [Page 62]

RFC 1382                 X.25 Packet Layer MIB             November 1992


               (1..4096) to (0..4095).

          June 1992

          The June 92 release (Editor's Internal Reference Number 2.11)
          made the following changes:

               A value of dxe was defined for x25AdmnInterfaceMode and
               x25OperInterfaceMode.

               The objects in the x25ChannelTable can now have a value
               of zero to indicate no channels configured in the range.

               The length of an X121Address was extended to 17 to
               accommodate the 1988 CCITT X.25 standard.

               Some object descriptions have been expanded and
               simplified, these include:  all the channel table objects
               except the index, x25AdmnDataRxmtCount,
               x25AdmnRejectCount, x25AdmnRegistrationRequestCount,
               x25OperDataRxmtCount, x25OperRejectCount,
               x25OperRegistrationRequestCount, x25CircuitEstablishTime,
               x25ClearedCircuitTimeEstablished,
               x25ClearedCircuitTimeCleared, x25CallParmIndex,
               x25CallParmInPacketSize, x25CircuitCalledAddress,
               x25CircuitOriginallCalledAddress,
               x25CircuitCallingAddress, x25CallParmFastSelect,
               x25CallParmCug, x25CallParmCugoa, x25CallParmBcug,
               x25CallParmNui, x25CallParmRpoa, x25CallParmCallingExt,
               x25CallParmCalledExt, x25CallParmProtection,
               x25StatInCallRefusals and x25CallParmOutPacketSize.

               The x25StatNumberPvcs object was deleted and
               x25AdmnNumberPVCs and x25OperNumberPVCs objects added.

               The object x25StatOutDataPackets was added.

               The object x25AdmnProtocolVersionSupported as added.

               The x25CircuitRemoteDteAddress was deleted.

               Some ASN.1 errors were corrected.

          April 1992

          The April release (Editor's Internal Reference Number 2.8)
          made many changes to incorporate the comments of the working
          group meeting in March 1992.



Throop                                                         [Page 63]

RFC 1382                 X.25 Packet Layer MIB             November 1992


               All reference comments were changed to reference fields.

               The type PositiveInteger was imported from the RFC1381-
               MIB and used for all index and timer values.

               The x25PleTable was split into the x25AdmnTable,
               x25OperTable, and x25StatTable.

               The timer and counter objects from the x25CircuitTable
               were moved to the x25AdmnTable and replicated in the
               x25OperTable

               The objects in the x25CircuitTable were reordered to put
               the non-integer objects at the end of the table for
               easier implementation.

               The called and calling extension character set was
               extended to include a-f, and A-F.

               Additional states were added to the x25CircuitStatus
               object.

               Additional values were added to x25CircuitDirection
               x25CircuitCallParamId, and the addresses in the Circuit
               Table for PVCs.

               The length of the X25Address was changed to 0..15.

               The objects x25ClearedCircuitTimeEstablished,
               x25ClearedCircuitInPdus, and x25ClearedCircuitOutPdus
               were added to the x25ClearedCircuitTable.

               The name of the x25CircuitName was changed to
               x25CircuitDescr and the description was expanded.

               The access of the x25CircuitCallParamId was changed to
               read-only.

               The x25ClearedCircuitCodes object was split into the
               x25ClearedCircuitClearingCause and
               x25ClearedCircuitDiagnosticCode objects.

               The semantics of the x25ClearedCircuitIndex was
               redefined.

               Some of the description clauses were changed in an
               attempt to add clarity.




Throop                                                         [Page 64]

RFC 1382                 X.25 Packet Layer MIB             November 1992


               DEFVAL clauses were added to most objects in the
               x25CallParmTable.

               Additional text was added to the description section to
               provide an overview of the tables of the MIB.

               The minimum allowable value for maximum active circuits
               was changed from one to zero.

          February 1992

          The February release (Editor's Internal Reference Number 1.14)
          made many changes.

               Many of the tables were combined.  For example, the
               x25InfoTable, x25PktStatTable, and x25TmrStatTable were
               combined into the x25PleTable.  The x25ConInfoTable,
               x25ConStatTable, and x25ConTimrTable were combined into
               the x25CircuitTable.

               The objects for call parameters were drastically
               reworked.  All call parameters were combined in the
               x25CallParmTable.  Any table, such as the  x25PleTable or
               x25CircuitTable, that needs to reference call parameters
               identifies an entry in the new table.  As part of this
               the x25ConDefTable was deleted and replaced with the
               x25PleDefCallParamId.

               The x25PvcTable was deleted; the x25CircuitStatus object
               provides similar information about PVCs.

               The x25ClearedCircuitTable was added to record the status
               code of cleared circuits.

               Many object definitions were restructured. For example,
               the time units for timers was changed from 1/100ths of a
               second to milliseconds.  Some indexes into tables were
               replaced with object identifiers.

               Much of the introductory text was changed and the
               references were changed to match.

          October 1991

          The October release (Editor Internal Reference Number 1.10)
          made the following changes:

               Changed x25ConInfoStatus to clarify the description and



Throop                                                         [Page 65]

RFC 1382                 X.25 Packet Layer MIB             November 1992


               the pvcResetting(5) value was changed to pvcResetting(6)
               to avoid a conflict with a previous use of the number 5.

               The name of the counter object
               x25TmrStatRetryCountsExceeded was changed to
               x25TmrStatRetryCountExceededs.

               The name of the counter object
               x25TmrStatClearCountsExceeded was changed to
               x25TmrStatClearCountExceededs.

               All occurrence of Guage was changed to Gauge.

               Added the x25CallFcltyTable, x25CallFcltyCcittTable, and
               x25CallParamTable.

          June 1991

          The June release corrected some syntax errors and cleaned up
          some other minor things.

          April 1991

          The April 26 release of this document was the first release.
          That version was derived from the ISO work on network layer
          management as presented in ISO/IEC 10733 [11]

6.  Acknowledgements

This document was produced by the x25mib working group:

               Fred Baker, ACC
               Art Berggreen, ACC
               Frank Bieser
               Gary Bjerke, Tandem
               Bill Bowman, HP
               Christopher Bucci, Datability
               Charles Carvalho, ACC
               Jeff Case, Snmp Research
               Angela Chen, HP
               Carson Cheung, BNR
               Tom Daniel, Spider Systems
               Chuck Davin, MIT
               Billy Durham, Honeywell
               Richard Fox, Synoptics
               Doug Geller, Data General
               Herve Goguely, LIR Corp
               Andy Goldthorpe, british-telecom



Throop                                                         [Page 66]

RFC 1382                 X.25 Packet Layer MIB             November 1992


               Walter D. Guilarte
               David Gurevich
               Steve Huston, Process Software Corporation
               Jon Infante, ICL
               Frank Kastenholz, Clearpoint
               Zbigniew Kielczewski, Eicon
               Cheryl Krupezak, Georgia Tech
               Mats Lindstrom, Diab Data AB
               Andrew Malis, BBN
               Evan McGinnis, 3Com
               Gary (G.P.)Mussar, BNR
               Chandy Nilakantan, 3Com
               Randy Pafford, Data General
               Ragnar Paulson, The Software Group Limited
               Dave Perkins, Synoptics
               Walter Pinkarschewsky, DEC
               Karen Quidley, Data General
               Chris Ranch, Novell
               Paul S. Rarey, DHL Systems Inc.
               Jim Roche, Newbridge Research
               Philippe Roger, LIR Corp.
               Timon Sloane
               Mike Shand, DEC
               Brad Steina, Microcom
               Bob Stewart, Xyplex
               Tom Sullivan, Data General
               Rodney Thayer, Sable Technology Corporation
               Mark Therieau, Microcom
               Jane Thorn, Data General
               Dean Throop, Data General
               Maurice Turcotte, Racal Datacom
               Mike Zendels, Data General

In addition, the contributions of the following individuals are also
acknowledged:

                   John Harper, DEC
                   Chairman of the ISO committee for
                   Network Level Management Information

7.  References

   [1] Rose M., and K. McCloghrie, "Structure and Identification of
       Management Information for TCP/IP-based internets", STD 16, RFC
       1155, Performance Systems International, Hughes LAN Systems, May
       1990.

   [2] McCloghrie K., and M. Rose, "Management Information Base for



Throop                                                         [Page 67]

RFC 1382                 X.25 Packet Layer MIB             November 1992


       Network Management of TCP/IP-based internets", RFC 1156, Hughes
       LAN Systems, Performance Systems International, May 1990.

   [3] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
       Network Management Protocol", STD 15, RFC 1157, SNMP Research,
       Performance Systems International, Performance Systems
       International, MIT Laboratory for Computer Science, May 1990.

   [4] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions",
       STD 16, RFC 1212, Performance Systems International, Hughes LAN
       Systems, March 1991.

   [5] Rose M., Editor, "Management Information Base for Network
       Management of TCP/IP-based internets: MIB-II", STD 17, RFC 1213,
       Performance Systems International, March 1991.

   [6] Information processing systems - Open Systems Interconnection -
       Specification of Abstract Syntax Notation One (ASN.1),
       International Organization for Standardization, International
       Standard 8824, December 1987.

   [7] Information processing systems - Open Systems Interconnection -
       Specification of Basic Encoding Rules for Abstract Notation One
       (ASN.1), International Organization for Standardization,
       International Standard 8825, December 1987.

   [8] Stewart, B., Editor, "Definitions of Managed Objects for RS-232-
       like Hardware Devices", RFC 1317, Xyplex, Inc., April 1992.

   [9] Throop, D., Editor, "SNMP MIB extension for LAPB", RFC 1381, Data
       General Corporation, November 1992.

  [10] "Information technology - - Data communication - X.25 Packet
       layer Protocol for Data Terminal Equipment", International
       Organization for Standardization, International Standard 8208,
       March 1990.

  [11] "Information Technology - Telecommunications and information
       exchange between systems - Elements of Management Information
       Related to OSI network Layer Standards", Committee Draft
       International Standard 10733, November 1990.

8.  Security Considerations

   Security issues are not discussed in this memo.






Throop                                                         [Page 68]

RFC 1382                 X.25 Packet Layer MIB             November 1992


9.  Authors' Addresses

   Dean D. Throop
   Data General Corporation
   62 Alexander Dr.
   Research Triangle Park, NC 27709

   Phone: (919)248-8421
   EMail: throop@dg-rtp.dg.com










































Throop                                                         [Page 69]
