Telenetics 56 - Manual (Page 205)

AT Commands
Page 197
+VGM - Microphone Gain
This command causes the modem to set the microphone gain of the speakerphone
function.
Syntax +VGM=<gain>
Defined Values
<gain> Decimal number between 0 and 255 corresponding to the gain.
Reporting Current or Selected Values
Command: +VGM?
Response: <gain>
Example:
64 For the default setting.
Reporting Supported Range of Parameter Values
Command: +VGM=?
Response: <gain>
range
Example: 0-255
Result Codes
OK <gain> = 0-255.
ERROR Otherwise, or if not in Voice Mode with speakerphone enabled
(+VSP=1).
+VGS - Speaker Gain
This command causes the modem to set the speaker gain of the speakerphone
function.
Syntax +VGS=<gain>
Defined Values
<gain> Decimal number between 0 and 255 corresponding to the gain.
Reporting Current or Selected Values
Command: +VGS?
Response: <gain>
Example:
128 For the default setting.
Reporting Supported Range of Parameter Values
Command: +VGS=?
Response: <gain>
range
Example: 0-255
Result Codes
OK <gain> = 0-255.
ERROR Otherwise, or if not in Voice Mode with speakerphone enabled
(+VSP=1).