Multi-Tech Systems MMCModem GPRS (MTMMC-G) - Manual (Page 30)

Chapter 5 – Call Control Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 30
SideTone Modification +SIDET
Description: This command sets the level of audio feedback in the speaker (microphone feedback in the speaker).
Values:
0
SideTone is disabled
1 SideTone is enabled
(default value 0 will be used if this parameter is not given)
0 0 db
1 - 6 db
2 - 12 db
3 - 18 db
Syntax: AT+SIDET=,
Command Possible responses
AT+SIDET=1,0 OK
Note: Command valid
AT+SIDET?
Note: Current value +SIDET: 1,0
OK
Note: Command valid
AT+SIDET=? +SIDET: (0-1),(0-3)
OK
Initialize Voice Parameters +VIP
Description: This command allows factory settings for voice parameters to be restored from EEPROM.
These voice parameters include:
• Gain control ( +VGR & +VGT commands)
• Gain controller ( +WSVG command)
• Microphone mute control ( +CMUT command)
• Speaker & Microphone selection ( +SPEAKER command)
•
Echo cancellation ( +ECHO command)
• Side tone modification ( +SIDET command)
Values:
1 Restore all voice parameters.
Other values are not supported.
Syntax: AT+VIP=
Command Possible responses
AT+VIP? +VIP: 1
OK
AT+VIP=2
Note: Syntax error +CME ERROR: 3
AT+VIP=1
Note: Restore the factory settings from EEPROM OK
Note: The command has been executed
AT+VIP=1
Note: Restore the factory settings from EEPROM
with the current Echo cancellation algorithm
(different of the default algorithm). CME ERROR: 519
Note: Reset the product to accept the new
algorithm.
AT+VIP=?
Note: List of supported s +VIP: (1)
OK