                                                   ZyXEL Communications Corp.
                                                      edited by Manfred Recla
                                                                July 23, 1997


              Release Note of U1496 Series Version 6.18
           ==============================================


New feature:
------------
1. Add "Psudo DCD HDX" feature by setting s12.7=1
   Psudo DCD HDX ---> If continously more than 48 mark received, DCD off,
                      otherwise DCD stay on.

New implemented:
----------------
1. Add ati3 response for legacy PnP-ID (UNIMODEM) under Windows95
   and WindowsNT 4.0
   ---> note: new INF driver files for Windows95 Plug&Play are required !
              you can request these files from our Internet FTP site:
              ftp://ftp.zyxel.co.at/public/u-series/1496/software/Windows95/

Bug fix
-------
1. Busy detection in voice record mode is more sensitive.
2. Change Russian CND default value.
3. Improve Russian busy detection.
4. Improve performance of synchronous operation when single external clock
   been applied.
5. Fix "Modem rings, when pulse dialing from attached telephone set".
6. Fix "Endless false connect at V.21, Bell 103, V.23" by setting s58.4=1
7. Fix leased line Originate mode accidently changed to Answer mode when
   pressing D/V key twice during handshaking.
8. Repeated generate answer tone during leased line handshaking by default.
   To disable this by setting s57.1=1.
9. Report Class 1 fax capability by factory default (s57.4=1)
   (for Symantec/Delrina WinFax Pro, MS Personal Fax for WindowsNT4, etc...)

