


       ********* ZyXEL Firmware Version 6.10 Release Note *****************



   1. V.42 Selective Reject feature is implemented and enabled as default,
      connect message is also changed. example: "CONNECT 57600/ARQ/V42b/SREJ.
      Reset bit 5 of S35 to disable Selective Reject.

   2. V.42 adaptive block sizing scheme is improved.

   2. V.29 4W leased line connection problem is fixed.

   3. Setting bit 5 of s39 will disable scrambler and discrambler in V.26
      operation.  This will make ZyXEL modem compatible with some old V.26
      modems which are not equipped with scrambler and discrambler.

   4. S39 bit 6 :   0 - The function of DTMF detection is enabled only
                        in PLAY or RECORD mode.

                    1 - The function of DTMF detection is enabled after the
                        command "AT+VLS=2" is sent.

                    Note : The function of AT auto baud detection is disabled
                           when the DTMF detection is enabled.

   5. S39 bit 7 :   0 - The recorded voice data do not include the resync
                        information.

                    1 - The recorded voice data include the resync
                        information in ADPCM mode.

                    Note: When the resync function is enabled, the modem  sends
                          a resync symbol -- DLE DC2 (0X10, 0X12), with voice
                          data every 50ms. Resync symbol resets the ADPCM coder
                          so that an ADPCM message can be edited without
                          continuity problem.


   6.   V.42 for 11-bit character length implemented.

   7.   ATDR response is quicker now.

   8.   Fix the problem of DTE speed being fixed at 19200 after setting
        AT+fclass=8.

   9.   Problem of garbled RING 1 message is corrected.

  10.   Problem of HS LED on at 300 bps connection is fixed.

  11.   Add "verify" action while entering new password.  New supervisory
        password has to be entered twice in order to save it to EEPROM.

  12.   E,7,1 data format password problem is fixed.

  13.   If S42.7=1 DCD only pulse off for 0.5 sec.

  14.   Add password protection, password can not be hardware reset when
        bit 6 of s35 is set in profile 0.

  15.   AT&Nxx*Q1 will fix modem speed at &Nxx selected. This requires both
        ends have the same setting.

  16.   If &D1 is set on leased line operation, DTR off will drop the connection
        ; DTR on will force handshaking and re-conncet the line.

  17.   Multiple page fax receiving problem with Cannon B200 solved.

  18.   Unused ROM space will be filled with FFs for programming efficiency of
        the EPROM programmer.

  19.   The ADPCM coding algorithm is modified. The file VCNVT.ZIP includes
        source code of the modified algorithm.

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