Specifications

Chapter 4 – Call Control Commands
Multi-Tech Systems, Inc. CDMA AT Commands Reference Guide (PN S000294K) 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