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16–24
Answering machine (Fax call)
← OK Returns to the command
state.
AT+VSM=2 → Changes to 2-bit
ADPCM for recording.
← OK
AT+VRX → Starts recording.
← CONNECT
← <DATA>
← <DLE>b
or
<DLE>q
The DCE detects a busy
tone or
a long period of quiet.
<DLE><!> → Stops recording.
← <DATA> The DCE delivers the re-
maining data.
← <DLE><ETX>
← OK Returns to the command
state.
AT+VLS=0 → Deactivates the line con-
nection.
← OK
AT+FCLASS=0 → Returns to the data mode.
← OK
DTE DCE Description
AT+FCLASS=8 → Switches to voice mode.
← OK
AT+VSM=? →
← 2;ADPCM;2;0;(9600)
3;ADPCM;3;0;(9600)
30;ADPCM;3;0;(9600)
4;ADPCM;4;0;(9600)
OK
DTE DCE Description