
        ********  Release Note for Version 4.00  *************

        These notes is accumulated from version 3.95


 1. Problem Fixed :

        a. Improved the fax auto detection compatability.

        e. Solve the compatable problem with 303-444-7791 (T2500, 9600).

        c. Change the screen display to "Loading Default" when hardware reset
                in LCD model.

        d. Solve the problem of "PHASE D ERROR" when using BitFax, please
                set the bit 3 and 4 of S39 to be 1 (S39=0X18) if you want
                to use BitFax.

        e. Compatablity problem with some 2400 MNP5 modems. (CompuCom ...)

        f. Non-Error control mode BREAK function is added.

        g. Solve the problem of V42 protocol error.

        h. Solve the compatable problem with 212-427-1805 (Hayes, 2400).


 2. Function Updated

        a. Add the CCITT V.23 1200/75 mode.

        b. Add the level 2 security function.

           ;----------------------------------------------------------------
           Newest security function command set :

           + *G0                      Disable security function

             *G1                      Enable level 1 secutity, with password
                                      check.
             *G2                      Enable level 1 security, with password
                                      check and call back.
             *G3                      Enable level 2 secutity, with password
                                      check.
             *G4                      Enable level 2 security, with password
                                      check and call back.
             *G5                      Enable level 2 security, with password
                                      check and call back, remote site enter
                                      the call back number.
                NOTE:
                      1. The command *Gn needs password checking.
                      2. In security level 1, the remote site must be a ZyXEL
                         modem.
                      3. In security level 2, the remote site can be any other
                         modems.
                      4. Modem can store 10 sets ( 0-9 ) of telephone number.
                         If call back security disabled, modem will search the
                         password table to check the remote modem's password.
                         If match, modem will keep connected, otherwise modem
                         will hangup the phone. If call back security enabled,
                         modem will complete security checking, if not match,
                         modem will just disconnect the line, otherwise modem
                         will discoonect the line then find the telephone
                         number and call back immediatly. Remote modem will
                         auto-answer the phone and response otherwise modem
                         will disconnect the line.


        c. In class 2 mode, the DTE speed will keep in constant after
           the response "AT+FCON".

        d. If you are using BitFax, please save the bit 3 of S39 to be 1,
           and save it to the profile 0.

        e. If you are using BitFax for windows, please add the string
           "ATE0" into the dialing prefix in the transmit section of setup.

        f. Change 'ESC ESC' responese with 'ZyXEL' in BBS fax receiving
           function.

        g. Restore DTE speed when fax receiving is finished.

 3. Note for BBS SysOp :

        To make your BBS receive the incoming FAX, you need to change the
                following setup :

                1. Add the string "#B1+FCLASS=6" into the init string. Be
                   sure that the "+FCLASS=6" must be the last command.
                2. change one of the connect message list to be "CONNECT FAX".
                3. set the external mail string need to be set as "ZyXEL".
                   Give this external an error level to shell out to dos.
                3. in your BBS batch file, if the error level matches the
                   external mail, execute "rcvfax comport workpath" or
                   "rcvtif comport workpath".
                4. Now, you can use U1496 to receive a fax in your BBS.

        1. The following is a sample setting in the frontdoor system :

                Add in the init String : X7#B1+FCLASS=6

                         Messages 
                         300         CONNECT|         
                         1200        CONNECT 1200     
                         1275        CONNECT FAX      
                         2400        CONNECT 2400     
                         4800        CONNECT 4800     
                         9600        CONNECT 7200     
                         19200       CONNECT 9600     
                         38400       CONNECT 14400    
                        

             External Mail 
                  String                       Error Level         
             1    ZyXEL                           100              
             2                                                     
             3                                                     
             4                                                     
             5                                                     
             6                                                     
             7                                                     
             8                                                     
             9                                                     
             10                                                    
            


        2. For the Binkley User, add the following string into the file
           "binkley.cfg" :

                Init    AT&FX7s0=1#b1+fclass=6|
                ExtrnMail ZyXEL errorlevel

