Siemens M20 Terminal Technical Description page 91

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AT+VGT Transmit gain selection of microphone
Test command Response
AT+VGT=? +VGT: (list of supported <n>) OK
Parameter
see set command
Read command Response
AT+VGT? +VGT: <n> OK
:
Note
Parameter
see set command
Set command Response
AT+VGT=[<n>] TA sets amplification of audio samples sent from the TA to the computer.
OK
Parameter:
<n>
:
Note
Reference Note
GSM 07.07 Set command works only in audio mode 3.
AT+VIP Initialize voice parameters
Test command Response
AT+VIP=? +VIP: list of supported <n>s OK
Parameter
see set command
Test command Response
AT+VIP? +VIP: <n> OK
Parameter
see set command
Set command Response
AT+VIP=<n> TA activates the selected audio set.
OK
Parameter
<n>
Reference Note
GSM 07.07 In mode 1, no audio parameters can be set. The following set commands can be used in mode 3:
+VGR
+VGT
^SNFA
^SNFI
^SNFO
^SNFE
Version 8 dated 15.03.00
this command may only be used with (AT^SNFS=3) audio mode 3.
0 – Automatic gain control
1(0x1)-128(0x80)-255(0xFF)
gain=20*log(n/128)
default value is 128.
Hex input not accepted
1(0x1)
Audio mode 1: standard mode approved for handset V38140-H-X33
3(0x3)
Audio mode 3: customer-specific mode; all audio parameters can be
adjusted by AT commands
AT command interface
A
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