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

Chapter 15 – GPRS Commands  

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

164 

 

Description: 

The set command disables or enables an automatic positive response (auto-answer) to the receipt of a 
Request PDP Context Activation message from the network. It also provides control over the use of the 
V.25ter basic commands 'S0', 'A and 'H' for handling network requests for PDP context activation. The 
setting does not affect the issuing of the unsolicited result code RING or +CRING.  

 

The test command returns values of <n> supported by the modem as a compound value. 

 

When the +CGAUTO=0 command is received, the modem will not perform a GPRS detach if it is 
attached. Subsequently, when the modem announces a network request for PDP context activation by 
issuing the unsolicited result code RING or +CRING, the DTE may manually accept or reject the 
request by issuing the +CGANS command or may simply ignore the network request. 

 

When the +CGAUTO=1 command is received, the modem will attempt to perform a GPRS attach if it is 
not already attached. Failure will result in ERROR or, if enabled, +CME ERROR being returned to the 
DTE. Subsequently, when the modem announces a network request for PDP context activation by 
issuing the unsolicited result code RING or +CRING to the DTE, this is followed by the intermediate 
result code CONNECT. The modem then enters V.25ter online data state and follows the same 
procedure as it would after having received a +CGANS=1 with <cid> values specified. 

0 

Turn off automatic response for GPRS only 

 

For <n> = 0 GPRS network requests are manually accepted or rejected by the +CGANS 
command. 

1 

Turn on automatic response for GPRS only 

 

For <n> = 1 GPRS network requests are automatically accepted according to the description 
above. 

2 

Modem compatibility mode, GPRS only 

 

For <n> = 2, automatic acceptance of GPRS network requests is controlled by the 'S0' 
command. Manual control uses the 'A' and 'H' commands, respectively, to accept and reject 
GPRS requests. (+CGANS may also be used.) Incoming circuit switched calls can be neither 
manually nor automatically answered 

3 

Modem compatibility mode, GPRS and circuit switched calls (default) 

 

For <n> = 3, automatic acceptance of both GPRS network requests and incoming circuit 
switched calls is controlled by the 'S0' command. Manual control uses the 'A' and 'H' 
commands, respectively, to accept and reject GPRS requests. (+CGANS may also be used.) 
Circuit switched calls are handled as described elsewhere in this specification. 

 

  In class C GPRS the modem can’t receive GPRS and GSM incoming calls 

simultaneously. 

AT+CGAUTO=[<n>] OK 

ERROR 

AT+CGAUTO? +CGAUTO: 

<n> 

OK 

AT+CGAUTO=? +CGAUTO: 

(0-3) 

OK 

AT+CGAUTO=? 
+CGAUTO: (0-2) 
OK 
AT+CGAUTO? 
+CGAUTO: 2 
OK 
AT+CGAUTO=0 
OK