
Chapter 4 – Call Control Commands
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
28
Side Tone Modification +SIDET
Description:
This command is used to set the level of
audio feedback
in the speaker (microphone feedback in the
speaker).
Values:
<val1>
0
Sidetone is disabled
1
Sidetone is enabled
<val2>
0
No side tone
1
Handset Sidetone levels
2
Headset Sidetone levels
3
Max Sidetone level
Syntax:
Command syntax:
AT+SIDET=<val1>,<val2>
Command
Possible Responses
AT+SIDET=1,0
OK
Note: Command valid
AT+SIDET?
Note: Current value
+SIDET: 1,0
OK
Note: Command valid
Initialize Voice Parameters +VIP
Description:
This command allows voice parameters to be restored from NV memory.
Values:
Gain controls are restored (+VGT and +VGR)
Voice path selection is restored (+SPEAKER)
Echo cancellation is restored (+ECHO)
Sidetone values are restored (+SIDET)
Syntax:
Command syntax:
AT+VIP
Command
Possible Responses
AT+VIP
OK
Note: Command valid
TTY Mode +WTTY
Description:
This command enables TTY mode on the headset audio path. The modem must be in a voice call to set this
command, and when the call ends it goes back to standard audio mode.
Syntax:
Command syntax:
AT+WTTY
Command
Possible Responses
AT+WTTY
OK
Note: Command valid