1;CELP;1;0;(9600)
2;ADPCM;2;0;(9600)
3;ADPCM;3;0;(9600)
<---OK
AT+VSM=1
--->
Select CELP compression method
<---
OK
AT+VLS=2
--->
Connect to line
<---
VCON
AT+VTX
--->
Start to play greeting message
<---
CONNECT
<DATA>
--->
<DLE><ETX>
--->
<---
VCON
return to command state
AT+VRX
--->
Start to record
<---
CONNECT
<---
<DATA>
<---
<DLE>b
DCE detects busy tone
or
or
<DLE>q
long period of quiet
AT
--->
Stop recording
<---
<DATA>
DCE deliver remaining data
<---
<DLE><ETX>
<---
VCON
Return to command state
AT+VLS=0
--->
Deactivate line connection
<---
OK
AT+FCLASS=0
--->
Return to data mode
<---
OK
5. Answering machine (Fax call).
DTE
DCE
comments
-----------
------
--------------
------------------
AT+FCLASS=8
--->
Switch to voice mode
<---
OK
AT+VSM=?
--->
1;CELP;1;0;(9600)
2;ADPCM;2;0;(9600)
3;ADPCM;3;0;(9600)
<---
OK
AT+VSM=1
--->
Select CELP compression method
<---
OK
AT+VLS=2
--->
Connect to line
<---
VCON
