C55/C55i AT COMMAND SET Description Preliminary - Falcom

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C55/C55I AT COMMAND SET VERSION 1.00 parameter to values greater than 7 will not allow a successful context activation and is not recommended. • The automatic GPRS attach will not be performed on recalling a stored user profile with ATZ or on power up, if an > 0 setting was stored in the user profile with AT&W. • If the automatic GPRS attach fails (e.g. the network rejects the attach request), the write command returns with error, but the value of is changed anyway. This is necessary because ATS0 is used for circuit switched calls too (see ATSO). • ATSO write command is PIN protected. 9.19 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 defined 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. AT+CGDCONT? OK 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: AT + CGDCONT=1, "IP" OK Define CID 2 and sets PDP type, APN and IP addr: AT+CGDCONT=2,"IP","internet.t-d1.gprs",111.222.123 . 234 OK A following read command will respond: AT+CGDCONT? + CGDCONT:1,"IP","", "",0,0 +CGDCONT:2,"IP","internet.t-d1.gprs",111.222.123 . 234 OK Set the CID 1 to be undefined: AT+CGDCONT=1 OK A following read command will respond: AT+CGDCONT? +CGDCONT:2,"IP","internet.t-d1.gprs",111.222.123.234 OK This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission. Page 192
C55/C55I AT COMMAND SET VERSION 1.00 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". 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: AT+CGQREQ=1,2 OK A following read command will respond: AT+CGQREQ? +CGQREQ: 1,2,0,0,0,0 OK 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: AT+CGQREQ=1 OK Once defined, the CID it can be activated. To activate CID 2 use: AT+CGACT=1,2 OK 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: AT+CGACT= OK 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: 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 (="PPP" and as described for command AT+CGDATA). 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 This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission. Page 193
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C55/C55i AT COMMAND SET Description Preliminary - Falcom

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