Digicom pocket GSM User Manual page 41

PocketGSM
AT+SPEAKER Speaker and Microphone selection
With a single command, you can set the factory parameters of the commands: AT+VGR ,
AT+VGT , etc ; in this way you can quickly improve the quality of the voice.
Note: Act also on AT+VGR, AT+CGT, commands to improve the quality of the voice. If there is noise
you could connect an external antenna with extension cable.
Command
AT+SPEAKER=0
AT+SPEAKER?
Default: AT+SPEAKER=0
AT+CMUT Mute Control
During a voice connection, this command disables the microphone while the speaker is
always active.
Command
AT+CMUT=0
AT+CMUT=1
AT+CMUT?
Default: AT+CMUT=0
AT+VTS Send DTMF tones
During a voice connection, this command sends the DTMF tones, to allow the surfing in
vocal servers.
Note: wait always the OK, before sending another tone.
Command
AT+VTS=<DTMF>
<DTMF> DTMF tones
0...9 Numbers from 0 to 9
# # character
* Asterisk character
A...D A, B, C, D characters
Possible answers
OK
+SPEAKER: 0
Possible answers
OK
OK
+CMUT: 0
Possible answers
OK / ERROR
4.21
AT Commands
Action
Configuration for "telephone handset"
Shows the current settings
Action
Microphone enabled
Microphone disabled (MUTE)
Shows the current settings
Action
Send the specified DTMF tone