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

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Chapter 12 – V.24 and V.25 Commands  
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 
102 
 
Set DTR Signal   &D 
Description:  
This commands controls the Data Terminal Ready (DTR) signal
.
 
Values:  
<n> 
0 
The DTR signal is ignored 
1 
Modem switches from data to command mode when DTR switches from ON to OFF 
2 
Upon DTR switch from ON to OFF, the call is released 
Syntax: Command 
syntax: AT&D<n> 
Command 
Possible responses
AT&D0 
Note:  The DTR signal is ignored 
OK 
Note: Command valid 
AT&D1  
Note:  Modem switches from data to command mode when 
DTR switches from ON to OFF 
OK 
Note: Command valid  
AT&D2  
Note:  Upon DTR switch from ON to OFF, the call is released 
OK 
Note: Command valid  
 
 
 
Set DSR Signal   &S 
Description:  
This commands controls the Data Set Ready (DSR) signal. 
Values: <n> 
0  DSR always on 
1  DSR off in command mode. DSR on in data mode.  
Syntax: Command 
syntax: AT&S<n> 
Command 
Possible responses 
AT&S0 
Note:  DSR always on  
OK 
Note: Command valid 
AT&S1  
Note:  DSR off in command mode, DSR on in data mode
OK 
Note: Command valid  
 
 
 
Back to Online Mode  O 
Description: 
If a connection has been established and the ME is in command mode, this command allows you to 
return to online data mode. 
Values:   
No parameters
 
Syntax: Command 
syntax: ATO 
Command 
Possible responses
ATO 
Return from offline mode to online mode 
OK 
 
 
 
Result Code Suppression   Q 
Description:  
This command determines whether the mobile equipment sends result codes or not. 
Values: <n> 
0 
DCE transmit result codes 
1 
Result codes are suppressed and not transmitted
 
Syntax: Command 
syntax: ATQ<n> 
Command 
Possible responses 
ATQ0 
Note:  DCE transmits result codes  
OK 
Note: Command valid 
ATQ1  
Note:  Result codes are suppressed and not transmitted 
Note: No response