Multi-Tech Systems CDMA Wireless Modem - Manual (Page 43)

Chapter 5 – Call Control Commands
Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C 43
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