Specifications

AT Command Set for L55 Platform 2003-11-21

2.8.2 Examples and hints for using GPRS commands

2.8.2.1 Defining and using a Context Definition Id (CID):

Every time a CID is used as a parameter for a GPRS command the CID has to be defined first via the

AT+CGDCONT command.

To retrieve the parameter of a CID the AT+CGDCONT read option must be used.

If the response of AT+CGDCONT? is OK only, no CID is defined.

AT+CGDCONT?

OK // no CID defined

All parameters of the CID are initiated by NULL or non-existing values, and the CID itself is set to

undefined. To define a CID use the AT+CGDCONT command with at least one CID parameter.

The present version of the mobile software supports CID 1 and CID 2 by using the AT+CGDCONT

command.

e.g.

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,IP, "internet.t-d1.gprs", 111.222.123.234

OK // defines CID 2 and sets PDP type, APN and IP addr

A subsequent read command will return

AT+CGDCONT?

+CGDCONT:1,IP

+CGDCONT:2,IP," internet.t-d1.gprs",111.222.123.234

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