Specifications

AT command set for XX Siemens mobile phones and modems
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Document No.: A30880-A10-A001-XX-
D376
Revision: Master R75
Revision Date: 29. September, 2004
132
If no CID is defined the mobile returns +CME ERROR: invalid index
Remark: If the mobile is NOT attached via AT+CGATT=1 before activating, the attach is automatically done by
means of the AT+CGACT command.
After a CID has been defined and activated, it can be used using AT commands as in the following example:
AT+CGDATA=PPP,1
CONNECT // the mobile is connected using the parameters of CID 1
AT+CDATA=
CONNECT // the mobile is connected using default parameter
The mobile supports Layer 2 Protocol (L2P) PPP only.
Remark: If the mobile is NOT attached by means of AT+CGATT=1 and if the CID is NOT activated before
connecting, the attach and activate is automatically done by means of the AT+CGDATA command.
Example to define a TFT for a CID
The handling and behaviour of a TFT is similar to the QoS, the only difference is that the CID has to be defined
before the TFT:
Here are some examples to define a TFT:
AT+CGDCONT=1,IP, "internet.t-d1.gprs"
OK // define the context first
AT+CGTFT=1 // reset all TFT packet filter of CID 1
OK
AT+CGTFT=1,2,1 // set TFT filter 2 with eval. precedence index 2 for CID 1
OK
// set TFT filter 3 with all parameter of an IPv4 CID 1
AT+CGTFT=1,3,1,”123.124.125.126.233.234.235.236”,1,”2.655”,”0.65534”,”ABCDEF”,”0.255”
OK
Remark: It is possible to change the QoS and TFT parameter while a context is active or online. The new values
are temporary stored in the ME and take effect if the context is activated next time or using the AT+CGCMOD
command.
4.3 The GPRS dial command ATD
For more detailed information see [2].
As an alternative to using the GPRS-AT commands it is possible to connect to a GPRS network by using the dial
command "atD".
There are two GPRS Service Codes for the ATD command. Values 98 and 99.
e. g.:
ATD*99#
CONNECT // establish a connection via service code 99
ATD*99*123.124.125.126*PPP*1#