Chapter 5 – Call Control Commands

Microphone Gain +VGT

Description: This command sets the microphone gain of the current audio path.

Values:

<MicGain> value to Microphone relative gain:

 

 

AT+VGT Value

 

Microphone Relative Gain Step (dB)

 

 

0

 

-2

 

 

 

1

 

+6

 

 

 

2

 

+8

 

 

 

3

 

+16

 

 

Syntax:

Command syntax: AT+VGT=<MicGain>

 

 

Command

 

Possible Responses

 

 

AT+VGT=2

 

OK

 

 

 

 

 

Note: Command valid

 

 

AT+VGT?

 

+VGT: 2

 

 

Note: Interrogate value

 

OK

 

 

 

 

 

Note: Current value

 

 

AT+VGT=?

 

+VGT : (0-3)

 

 

Note: Test command

 

OK

 

 

 

 

 

Note: Possible values

 

Volume Gain Control +VGR

Description: This command is used by the application to tune the receive gain of the speaker. If the modem is in the Idle state, it will generate an audible tone at the selected volume.

Values:

<RGain> value to Speaker relative gain:

 

AT+VGR Value

Speaker Relative Gain Step (dB)

 

 

0

Mute

 

 

1

-23

 

 

 

2

-17

 

 

 

3

-11

 

 

 

4

-5

 

 

Syntax:

Command syntax: AT+VGR=<Rgain>

 

Command

 

Possible Responses

 

AT+VGR=2

 

OK

 

 

 

Note: Command valid

 

AT+VGR?

 

+VGR: 2

 

Note: Interrogate value

 

OK

 

 

 

Note: Current value

 

AT+VGR=?

 

+VGR : (0-4)

 

Note: Test command

 

OK

 

 

 

Note: Possible values; default: 3

Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C

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Multi-Tech Systems CDMA Wireless Modem manual Microphone Gain +VGT, Volume Gain Control +VGR