IBM Aptiva Series Handbook page 149

Table 10: AT commands (Continued)
Command Function
Modem on-hook (hang-up)
Modem off-hook (make busy)
Firmware and device ID
Checksum code
ROM test
Firmware and device ID
Low speaker volume
Low speaker volume
Medium speaker volume
High speaker volume
Speaker always off
Speaker on until carrier detected
Speaker always on
Automode disabled, modem handshake speed specified by S37
Automode enabled, modem handshake speed specified by S37
Return to data mode
Initiate an equalizer retrain and return to data mode
Pulse dial
Result codes enabled
Result codes disabled
Modem commands B-7