C55/C55i AT COMMAND SET Description Preliminary - Falcom

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C55/C55I AT COMMAND SET VERSION 1.00 Parameter Description (num) [0] the request is rejected and the MT returns OK to the TE 1 accept and request that the PDP context be activated (str) a string parameter which indicates the layer 2 protocol to be used (see AT+CGDATA command) (num) a numeric parameter which specifies a particular PDP context definition (see AT+CGDCONT command). Note • If is 1, the following procedure is followed by the MT: If the parameter value is unacceptable to the MT, the MT will return an ERROR or +CME ERROR response. Otherwise, the MT issues the intermediate result code CONNECT and enters V.25ter online data state. A may be specified for use in the context activation request. During the PDP startup procedure the MT has the PDP type and the PDP address provided by the network in the Request PDP context activation message. If this is in conflict with the information provided by a specified , the command will fail. There will be no conflict, if the PDP type matches exactly and the PDP address given by the context definition for is empty or matches exactly with the address specified with the network PDP context activation message. The context will be activated using the values for PDP type and address provided by the network, together with all other information found in the PDP context definition. An APN may or may not be required, depending on the application. If no is given or if there is no matching context definition, the MT will attempt to activate the context using the values for PDP type and address provided by the network. The other parameters will be set to their default values (see AT+CGDCONT). If activation is successful, data transfer may proceed. After data transfer is completed, and the layer 2 protocol termination procedure has completed successfully, the V.25ter command state is reentered and the MT returns the final result code OK. In the event of an erroneous termination or a failure to start up, the V.25ter command state is reentered and the MT returns the final result code NO CARRIER, or if enabled, +CME ERROR. Attach, activate and other errors may be reported. It is also an error to issue the AT+CGANS command when there is no pending network request. The command may be used in both normal and modem compatibility modes. This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission. Page 170
C55/C55I AT COMMAND SET VERSION 1.00 9.3 AT+CGATT GPRS attach or detach Syntax Test Command AT+CGATT=? Response(s) +CGATT: (list of supported s) OK Response(s) Read Command AT+CGATT? +CGATT: OK Write Command Response(s) AT+CGATT=[] OK ERROR +CME ERROR Reference(s) PIN ASC0 GSM 07.07 ● ● Command Description The test command is used for requesting information on the supported GPRS service states. The read command returns the current GPRS service state. The write command is used to attach the MT to, or detach the MT from the GPRS service. After the command has completed, the MT remains in V.25ter command state. If the MT is already in the requested state, the command is ignored and the OK response is returned. Any active PDP contexts will be automatically deactivated when the attachment state changes to detached. If the MT is not able to attach for more than 5 minutes, command returns with "ERROR" or "+CME ERROR: unknown", but MT is still trying to attach. If the MT is not able to detach for more than 1 minute, command returns with "ERROR" or "+CME ERROR: unknown", but MT is still trying to detach. If an attach is issued during a running detach, command returns with "ERROR" or "+CME ERROR: unspecified GPRS error. Parameter Description (num) Indicates the state of GPRS attachement. 0 (P) detached [1] attached Notes • If the MT is in dedicated mode, write command returns with "+CME ERROR: operation temporary not allowed. • When the module is GPRS attached and a PLMN reselection occurs to a non-GPRS capable network or to a network where the SIM is not subscribed to for using GPRS, the resulting GMM (GPRS mobility management) state according to GSM 24.008 is This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission. Page 171
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C55/C55i AT COMMAND SET Description Preliminary - Falcom

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