ZyXEL Communications Omni 288S - Manual (Page 82)

Chapter 10 - Voice Mode Operation
10-3
Choose your Input/Output Device by typing the appropriate AT commands.
To select the telephone (connected to phone jack) as your I/O device, type:
AT+VLS=1
To select the external microphone as your input device, type:
AT+VLS=8
To select the modem internal speaker as your output device, type:
AT+VLS=16
Note: The external speaker simply replaces the internal speaker. As
an output device. Device selection remains the same.
Voice Mode Application Examples
Shown below are six examples of some common uses of the Omni 288S voice
mode operation, and the AT command sequences used to initiate them. The voice
application software you use will normally perform these functions automatically.
Recording a greeting message
Commands DCE Responses Description
AT+FCLASS=8 OK Switch to voice mode.
AT+VSM=? (reference table) List the compression schemes
AT+VSM=4 OK Select 4-bit ADPCM
compression method.
AT+VLS=1 VCON Activate the telephone set on the
PHONE jack.
AT+VRX CONNECT
Start recording.
OK
Stop recording, and return to
command state.
AT+VLS=0 OK Deactivate the telephone on the
PHONE Jack.
AT+FCLASS=0 OK Return to data mode.
Playing a voice file through the internal speaker
Commands DCE Responses Description
AT+FCLASS=8 OK Switch to voice mode.
AT+VSM=? (reference table) List the compression schemes
AT+VSM=2 OK Select 2-bit ADPCM
compression method.
AT+VLS=16 VCON Activate internal speaker.
AT+VTX
OK Start replay, then return to the
command state.