MC55 AT Command Set
10.19 Using GPRS AT commands (Examples) s
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MC55_ATC_V01.05 Page 278 of 469 2/10/04
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10.19 Using GPRS AT commands (Examples)Examples
EXAMPLE 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 de fined before by using
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.
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.
Define CID 1 and set the PDP type to IP, access point name and IP address are not set:
Define CID 2 and sets PDP type, APN and IP addr:
A following read command will respond:
Set the CID 1 to be undefined:
A following read command will respond:
EXAMPLE 2
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 divided in "requested QoS" and "minimum acceptable QoS".
AT+CGDCONT?
OK
There is no CID defined
AT+CGDCONT=1,"IP"
OK
AT+CGDCONT=2,"IP", "internet.t-d1.gprs", 111.22 2.123.234
OK
AT+CGDCONT?
+CGDCONT:1,"IP","","",0,0
+CGDCONT:2,"IP","internet.t-d1.gprs",111.2 22.123.234
OK
AT+CGDCONT=1
OK
AT+CGDCONT?
+CGDCONT:2,"IP","internet.t-d1.gprs",111.2 22.123.234
OK