                                          ZyXEL Communications Services GmbH.
                                                     edited by Manfred Recla
                                                                May 16, 2000



        Release Notes on ZyXEL's "G1" Modem series (=> U-1496xx)
        Version 6.22     - PUBLIC RELEASE -       March 27, 2000
        ========================================================


1.) filenames:
--------------------------------------------------------------------------
R622.TXT ........... This release note for U-1496 series firmware v6.22
ALLNOTES.ZIP ....... all release notes of previous firmware releases !


internal modem card (for PC's long ISA 8-bit slot), max. 19200bps
RM622BP.U24 ......... U1496B+          -> firmware v6.22 for EPROM U.24
RM622BP.U25 ......... U1496B+          -> firmware v6.22 for EPROM U.25


internal modem card (for PC's long ISA 8-bit slot), max. 16800bps
RM622B.U24 .......... U1496B           -> firmware v6.22 for EPROM U.24
RM622B.U25 .......... U1496B           -> firmware v6.22 for EPROM U.25


external modem with LEDs, max. 16800bps
RM622E.U24 .......... U1496E           -> firmware v6.22 for EPROM U.24
RM622E.U25 .......... U1496E           -> firmware v6.22 for EPROM U.25


external modem with LEDs, max. 19200bps
RM622EP.U24 ......... U1496E+          -> firmware v6.22 for EPROM U.24
RM622EP.U25 ......... U1496E+          -> firmware v6.22 for EPROM U.25


modem card for 19" rack system, max. 16800bps
with support for ZyXEL's NMS (Network Management System)
RM622RN.U24 ......... U1496R and RN    -> firmware v6.22 for EPROM U.24
RM622RN.U25 ......... U1496R and RN    -> firmware v6.22 for EPROM U.25


modem card for 19" rack system, max. 19200bps
RM622RNP.U24 ........ U1496R+ and RN+  -> firmware v6.22 for EPROM U.24
RM622RNP.U25 ........ U1496R+ and RN+  -> firmware v6.22 for EPROM U.25


external modem with LCD (without backlight), max.16800bps
RM622S.U24 .......... U1496S           -> firmware v6.22 for EPROM U.24
RM622S.U25 .......... U1496S           -> firmware v6.22 for EPROM U.25


external modem with LCD (with backlight), max. 16800bps, 
with support for ZyXEL's NMS (Network Management System) 
RM622SN.U24 ......... U1496SN          -> firmware v6.22 for EPROM U.24
RM622SN.U25 ......... U1496SN          -> firmware v6.22 for EPROM U.25


external modem with LCD (with backlight), max. 19200bps
RM622SP1.U24 ........ U1496S+          -> firmware v6.22 for EPROM U.24
RM622SP1.U25 ........ U1496S+          -> firmware v6.22 for EPROM U.25


external pocket-size modem, max. 16800bps
RM622CP.U24 ......... U1496P           -> firmware v6.22 for EPROM U.24
RM622CP.U25 ......... U1496P           -> firmware v6.22 for EPROM U.25
-------------------------------------------------------------------------


Solved modem bugs:
==================
1. Can't do the ALB (selftest) from rack controller at data state.
2. Set S57.6=1 for DTE data format mismatched problem with the DTE
   that can't support overspeed clock.


electronic greetings from Vienna, Austria
Manfred Recla
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