IBM Aptiva Handbook page 185

Table 13: Modem commands (Continued)
Code/Command Function
DsN The modem automatically dials a telephone number "N" where "N" is a complete telephone number. The command may
also include the following codes:
s=P Pulse dialing
s=R Dial an "originate-only" modem
s=T Touch-tone dialing
s=, Pause while dialing
s=@ Wait 30 seconds for a valid ringback followed by 5 seconds silence before next symbol
s=; Return to command state after dialing
s=! Go off-hook 0.5 seconds
s=W Wait for dial tone
Ds=n Dials one of four stored telephone numbers.
En Sets Echo on or off
n=0 Echo off
n=1 Echo on
Hn On/Off hook
n=0 On hook
n=1 Off hook
Ln Sets the volume of the speaker on the modem
n=0 Low volume
n=1 Low volume
n=2 Medium volume
n=3 High volume
Mn Controls when the modem speaker is in use
n=0 Speaker off
n=1 Speaker is on except when receiving
n=2 Speaker on
n=3 Speaker is off when dialing or receiving
On Online
n=0 Go online
n=1 Retrain at 2400 bps
Modem commands 171