Chapter 5 - Synchronous Mode Operation
5-3
You can always use the panel operation to control and configure the modem and
use the manual dial and answer to operate the modem.
Dialing from Synchronous Mode
1. Dial from the terminal using asynchronous commands. Set &M1 and use
asynchronous AT commands to dial the number. Once the modem is
connected, the modem will enter synchronous operation.
2. Dial through the computer using V.25bis commands. Some communication
software packages on synchronous computers can dial using V.25bis
synchronous commands. In this case, set &M3 and *I1 and the modem will
accept V.25bis commands and make a synchronous connection.
3. Using DTR to dial a stored number in synchronous mode. Store the
telephone number from the front panel STORE NUMBER menu or by the
asynchronous command &Zn=. Use the DEFAULT DIAL parameter menu or
*Dn command to select the default dial pointer. Set &D1 and either &M1 or
&M3, then raise DTR from your terminal or communication software. The
modem will dial the default stored number. After the modem is connected, the
modem will enter synchronous operation.
With S35b4 set, pressing the DATA/VOICE switch will also cause dialing of
the default number.
4. Manual dial. Set the modem to synchronous mode (&M1 or &M3), then dial
a number from a telephone set. When you hear the answer tone, type ATD (if
&M1 is set). The modem will go into synchronous operation after connection.
Answering from Synchronous Mode

Auto-Answer

Set the modem to synchronous mode. Set the S-register S0 to equal the number of
rings before auto-answer occurs. Set it from the terminal (if &M1 is set) using the
asynchronous AT command, or select the STATUS REGISTER menu to change
the S0 value.

Manual Answer

Type ATA from the terminal (if &M1 is set).