Using Gprs At Commands (Examples); Miscellaneous At Commands - Siemens MC35 Command Set

AT Command Set

6.4 Using GPRS AT commands (examples)

6.4.1 Miscellaneous AT commands

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 before by
the AT+CGDCONT command. To get the parameter of a CID use the AT+CGDCONT read option. If
the response of 'AT+CGDCONT?' is OK only, there is no CID defined.
AT+CGDCONT?
OK
All parameters of the CID are initiated by NULL or not present values and the CID itself is set to be
undefined. To define a CID use the AT+CGDCONT Command with at least one CID parameter. At the
moment the mobile supports CID 1 and CID 2 by using the AT+CGDCONT command.
Examples:
AT+CGDCONT=1,IP
OK
AT+CGDCONT=2,IP, "internet.t-d1.gprs", 111.222.123.234
OK
A following read command will respond
AT+CGDCONT?
+CGDCONT:1,IP
+CGDCONT:2,IP," internet.t-d1.gprs",111.222.123.234
OK
AT+CGDCONT=1
OK
A following read command will respond
AT+CGDCONT?
+CGDCONT:2,IP, "internet.t-d1.gprs",111.222.123.234
OK
Quality of Service (QoS) is a special parameter of a CID which consists of several parameters itself.
The QoS consists of
· the precedence class
· the delay class
·
the reliability class
·
the peak throughput class
·
the mean throughput class
and is devided in "requested QoS" and "minimum acceptable QoS".
MC35_ATC_01_V05.00
// there is no CID defined
// defines CID 1and sets the PDP type to IP
// access point name and IP address aren't set
// defines CID 2 ans sets PDP type, APN and IP addr
// sets the CID 1 to be undefined
Page 177 of 256 15.07.2002