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=8
--->
Activate external microphone
or telephone set on LINE Jack
<---
VCON
AT+VRX
--->
Start to record
<---
CONNECT
<---
<DATA>
AT
--->
Stop recording
<---
<DATA>
<---
<DLE><ETX>
<---
VCON
Return to command state
AT+VLS=0
--->
Deactivate external microphone
or telephone set on LINE Jack
<---
OK
AT+FCLASS=0
Return to data mode
<---
OK
2. Voice file playing via internal speaker.
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=16
--->
Activate internal speaker
<---
VCON