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Connect Modem to a M1 / 1000M

Connecting a US Robotics 56K external Modem onto a M1 system by Firebird Scrambler
Posted: 18 Apr 04

Information on connecting a US Robotics 56K external Modem onto a Meridian 1 system

These settings should work for a Meridian Option 11 - 81 TTY Port

     The tests were carried out using "TTY 2" with "USER" = (SCH) ONLY! On a Option 11 system.

   Do not have "USER" = (MTC,BUG,CTY, etc) as the TTY port could become disabled!.

         Also make sure that the standard TTY port settings are used i.e..
         "9600" baud rate word length = 8, 1 stop bit & no parity.

    U.S. Robotics 56K Voice EXT Rev. 12.1.0   (External stand alone type modem)

    U.S. Robotics 56K Voice EXT Settings...

    B0  E1  F1  L2  M0  Q1  V1  X4  Y0

    &A3  &B0  &C1  &D0  &H1  &I0  &K0
    &M4  &N6  &R1  &S0  &T5  &U0  &Y1  

    S00=002  S01=000  S02=043  S03=013  S04=010  S05=008  S06=004
    S07=060  S08=002  S09=006  S10=007  S11=070  S12=050  S13=000
    S15=000  S16=000  S18=000  S19=000  S21=010  S22=017  S23=019
    S25=005  S27=001  S28=008  S29=020  S30=000  S31=000  S32=000
    S33=000  S34=000  S35=000  S36=000  S38=000  S39=011  S40=000
    S41=001  S42=126

    (1.0USR9180\\Modem\PNPC107\U.S. Robotics 56K Voice EXT)FF

  Some other Notes!
    Use ATS0=2 C/R (Number of rings for modem to answer = 2)
                                  (I've found that a minimum number of 2 rings is best!)
    Use ATM0 C/R (Speaker on modem = OFF & ATM1 = Speaker on until connected)

Before you disconnect the line connection, Make sure that you are back into the Meridian SL1 program!.
Also key "+++" first & wait until you get the "OK" prompt.    (It takes you back to the modem!)
If you don't do this, then the TTY port can disable it's self or the modem will lock up.

How to configure the US Robotics 56K external Modem via a RS232 lead into your  P.C.

Key in the following à

ôAT&A3&B0&C1&D0&H1&I0&K0&M4&N6&R1&S0&T5&U0&Y1ö C/R.
  The modem will answer with ôOKö
Followed by  ôATB0E1F1L2M0Q1V1X4Y0ö C/R.
Enter the  ôSö Registers as shown in bold above. i.e.. ôATS0=2ö C/R.

Finally enter ôAT&W0ö C/R to store the data into memory. Power Modem "OFF" & "ON".
The prompt  ôATI4ö C/R will list out the values stored in memory.

To connect the Modem at 14400 baud rate & Meridian 1  TTY port at 19200 baud rate, Then use the settings  ôAT&N8ö C/R followed by  ôAT&W0ö C/R & power off & on the Modem again.

Back to Nortel: CS1000 (Meridian) systems FAQ Index
Back to Nortel: CS1000 (Meridian) systems Forum

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