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Chapter 10 - Voice Mode Operation
10-5
Command DCE Response 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 for
greeting message.
AT+VLS=2 VCON Connect to line.
AT+VTX CONNECT
<DATA>
<DLE>
c
or
<DLE>’
n’
<DATA>
<DLE><ETX>
OK
Start to play greeting message.
T.30 fax
c
alling tone
or
DTMF digit '
n
' detected.
Return to command state.
AT+FCLASS=2 OK Switch to fax mode.
ATA Try to handshake fax
mode.
Answer fax call.
Omni 288S as a Data answering machine
Command DCE Response 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 for
greeting message.
AT+VLS=2 VCON Connect to line.
AT+VTX CONNECT
<DATA>
<DLE><ETX>
OK
Start to play greeting message.
Return to command state.
AT+VSM=2 OK Change to 2-bit ADPCM for
recording.
AT+VRX CONNECT
<DATA>
<DLE>
s
Start recording.
DCE detects
s
ilence.
<DLE><!>
<DATA>
<DLE><ETX>
OK
Stop recording.
DCE delivers remaining data.
Return to command state.
AT+FCLASS=0 OK Switch to data mode
ATA Try handshake data
mode.
Answer data call.
Note:
If a modem data tone is detected (indicated by a <DLE>e
response) , the modem should be switched to data mode.