MC55 AT Command Set
10.19 Using GPRS AT commands (Examples)
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MC55_ATC_V01.05 Page 279 of 469 2/10/04
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All parameters of the QoS are initiated by default to the "network subscribed value (= 0)" but the QoS itself is
set to be undefined. To define a QoS use the
AT+CGQREQ or AT+CGQMIN command.
Overwrite the precedence class of QoS of CID 1 and set the QoS of CID 1 to be present:
A following read command will respond:
All QoS values of CID 1 are set to network subscribed now, except precedence class which is set to 2. Now
set the QoS of CID 1 to not present:
Once defined, the CID it can be activated. To activate CID 2 use:
If the CID is already active, the mobile responds OK at once.
If no CID and no STATE is given, all defined CIDs will be activated by:
If no CID is defined the mobile responds +CME ERROR: invalid index
Remark: If the mobile is NOT attached by
AT+CGATT=1 before activating, the attach is automatically done by
the
AT+CGACT command.
After defining and activating a CID it may be used to get online by:
The mobile supports Layer 2 Protocol (L2P) PPP only.
Remark: If the mobile is NOT attached by
AT+CGATT=1 and the CID is NOT activated before connecting,
attaching and activating is automatically done by the
AT+CGDATA command.
Some providers (e.g. D2 or E-Plus) require to use an APN to establish a GPRS connection. So if you use the
Microsoft Windows Dial-Up Network and ATD*9... to connect to GPRS you must provide the context definition
as part of the modem definition (Modem properties/Connection/Advanced.../Extra settings). As an alternative,
you can define and activate the context in a terminal program (e.g. Microsoft Hyperterminal) and then use the
Dial-Up Network to send only the
ATD command.
AT+CGQREQ=1,2
OK
AT+CGQREQ?
+CGQREQ: 1,2,0,0,0,0
OK
AT+CGQREQ=1
OK
AT+CGACT=1,2
OK
AT+CGACT=
OK
AT+CGDATA="PPP",1
CONNECT
The mobile is connected using the parameters of
CID 1.
AT+CGDATA=
CONNECT
The mobile is connected using default parameters
(
<L2P>="PPP" and <cid> as described for com-
mand
AT+CGDATA).
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