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GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

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Page 464<br />

<strong>GSM</strong> <strong>09.02</strong> <strong>Version</strong> <strong>5.3.0</strong>: August 1996<br />

Process Access Request Failure<br />

If any of this procedure fails (e.g. Authentication, IMEI Check, Ciphering or TMSI reallocation) the VLR will<br />

terminate the outgoing call set up procedure for this call. The MSC will have already been informed of the<br />

failure by the Process Access Request Procedure (see clause 21).<br />

Service Subscription Check Failure<br />

If the Bearer Service or Teleservice requested by the MS for this call is not available. The VLR will set the<br />

MAP_SEND_INFO_FOR_OUTGOING_CALL service parameter user error to either "Teleservice Not<br />

Provisioned" or 'Bearer Service Not Provisioned". This confirmation is then returned to the MSC and the<br />

procedures for this call terminated in the VLR.<br />

Calls Barred<br />

If calls for this MS are barred (e.g. all outgoing calls, conditional barring of outgoing calls, roaming barred<br />

or calls barred due to Operator Determined Barring as defined in TS <strong>GSM</strong> 02.41), the VLR will terminate<br />

outgoing call set up procedures. The MAP_SEND_INFO_FOR_OUTGOING_CALL service parameter user<br />

error will be set to "Call Barred", this is then returned to the MSC.<br />

CUG Failure<br />

If the call fails the CUG Authorization check (the procedures for authorizing an outgoing CUG call are<br />

defined in TS <strong>GSM</strong> 03.85), CUG failure will be reported back to the MSC, the<br />

MAP_SEND_INFO_FOR_OUTGOING_CALL service parameter user error will be set to "CUG Reject".<br />

Outgoing call set up procedures for this call will then be terminated in the VLR.<br />

Call Set up Failure<br />

If, following a MAP_COMPLETE_CALL service request from the VLR, the MSC fails to set up the call this<br />

will be reported as an error in MAP_COMPLETE_CALL service confirm. Regardless of the reason for<br />

failure, the VLR will set the user error parameter of MAP_SEND_INFO_FOR_OUTGOING_CALL to<br />

"System Failure". This service response is then returned to the MSC and the procedures in the VLR<br />

terminated.

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