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
130
The present version of the mobile software supports CID 1, CID 2 and CID 3 by using the AT+CGDCONT and
the AT+CGDSCONT command.
All three CIDs could be defined as a primary or a secondary context.
Furthermore the CIDs are global within the mobile. That means that it is possible to define and activate a context
using the cable and to deactivate and reset this context using another interface (e.g the IrDa).
e.g. for primary context definition and activation
AT+CGDCONT=1,IP
OK // defines CID 1 and sets the PDP type to IP
// access point name and IP address aren't set
AT+CGDCONT=2,IPV6, "APN", 111.222.123.234. 111.222.123.234.111.222.123.234.111.222.123.234
OK // defines CID 2 and sets PDP type IP version 6 , APN and IP addr
AT+CGDCONT=2,IP, "internet.t-d1.gprs", 111.222.123.234,1,1
OK // defines and overwrites CID 2 and sets PDP type, APN and IP addr and
manufacturer preferred compression for header and data
A subsequent read command will return
AT+CGDCONT?
+CGDCONT: 1,"IP","","",0,0
+CGDCONT:2,”IP”,"internet.t-d1.gprs",”111.222.123.234”,1,1
OK
AT+CGDCONT=1
OK // sets the CID 1 to be undefined
A subsequent read command will return
AT+CGDCONT?
+CGDCONT:2,”IP”,"internet.t-d1.gprs",”111.222.123.234”,1,1
OK
For secondary context definition and activation
// precondition: define and activate a primary context first
AT+CGDCONT=1,IP, "internet.t-d1.gprs", 111.222.123.234
OK // defines CID 1 as primary
AT+CGACT=1,1 // activate primary context
OK
AT+CGDSCONT=2,1,0,0 // define CID 2 as a secondary context of CID 1
OK // without header and without data compression
AT+CGACT=1,2 // activates the CID 2 (secondary)
OK
The activation of a secondary context depends on network support.
Defining Quality of service for a CID
Quality of Service (QoS) is a special parameter of a CID which again consists of several parameters.
The QoS consists of
• the precedence class
• the delay class