Multi-Tech Systems GPRS (MTMMC-G) ユーザーズマニュアル

Chapter 5 – Call Control Commands 

Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 

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Description: 

This command sets the type of incoming calls when no incoming bearer is given (see +CSNS). 

   Setting the +CICB command affects the current value of +CSNS. 

0 Data 

Speech 

Syntax:    

AT+CICB=<mode> 

AT+CICB=2 
Note: If no incoming bearer, force a voice call

OK 
Note: Command accepted  

AT+CICB? 
Note: Interrogate value 

+CICB: 2 
OK 
Note: Default incoming bearer: voice call 

AT+CICB=? 
Note: Test command 

+CICB: (0-2) 
OK 
Note: Speech or data default incoming bearer 

 

 

Description: 

Selects the bearer to be used when an modem single numbering scheme call is set up (see +CICB). 

 Setting the +CSNS command affects the current value of +CICB. 

0   Voice 

  Data 

Syntax:   

AT+CSNS 

AT+CSNS=0 

Note: force a voice call OK

Note: Command accepted  

AT+CSNS? Note: 

Interrogate value +CSNS: 0

Note: Default incoming bearer: voice call

AT+CSNS=? 

Note: Test command

+CSNS: (0,2,4) Note: Voice or data default incoming 

bearer 

 

 

Description: 

This command is used by the application to tune the receive gain of the speaker and the transmit gain 
of the microphone.  

Values:   

<Rgain> is the reception gain 

 

<Tgain> is the transmission gain 

Syntax:  

AT+VGR=<Rgain>  and    AT+VGT=<Tgain> 

AT+VGR=25 
 

OK 

Note: Command valid

AT+VGT=45 OK

Note: 

Command valid

AT+VGR? 
Note: Interrogate value 

+VGR: 128
OK 

Note: Default receive gain 

AT+VGR=? 
Note: Test command 

+VGR: (0-255)
OK Note: 

Possible 

values 

AT+VGT? 
Note: Interrogate value 

+VGT: 32
OK 

Note: Default transmit gain 

AT+VGT=? 
Note: Test command 

+VGT: (0-255)
OK Note: 

Possible 

values 

For the 

AT+VGT? command with controller 1, the value is the lower value of range; whereas, 

with controller 2, the value corresponds to the entered value using AT+VGT=xx.