ZYXEL COMMUNICATIONS U-1496

Manufacturer: ZyXEL Communications Inc.
Model: ZyXEL U-1496
Latest Firmware Revision Tried: V 6.19 M
Recommended Firmware Revisions: V 6.19 M
Last Updated: Date: 1999/03/28 21:22:11 $

  Includes support for digitized voice.
  The first modem with working Class 2.0 support.
  This modem is recommended for use with HylaFAX only with firmware revision 6.19 or later.

CLASS 2 SUPPORT

Most of the problems/issues found were fixed in the rev 6.13 firmware.

CLASS 2.0 SUPPORT

- Several comments have been made to the mailing-list to say that this modem suffers particularly from the retrain negative problem [ will send the first page three times, then abort ].
- However, the latest firmware, v6.19, has been reported to solve this issue; and the modem can be recommended for use with HylaFAX with this firmware revision or later.
- Problems were reported with the 1496EG+ model available in the German market. The advice was to get an old dusty 1496E.
- A 99.8% error free rate was the result of lowering the baud rate to 19200 in both the `ModemRate` as well as the S18 register. These are the necessary additions to the modem config file:

      # Additional reset commands:
      #
      # &B1         DTE-DCE rate is fixed at DTE setting
      # &N0         Auto-negotiate highest possible DCE-DCE link rate
      # &S0         DSR always on
      # *F0         Deny remote configuration
      # S18=3       Receive at 19200
      # S38.3=1     DCD on/off sequence follows UNIX standard; also
      #             fix receiving baud rate at S18 value
      # S39=0       (avoid Class 2 compatibility hacks)
      #
      ModemResetCmds:      AT&B1&N0&S0*F0S18=3S38.3=1S39=0
      #

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