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• File sgsn/BSSGP_ConnHdlr.ttcn:

  • Patch Set #4, Line 640: } else {

    So in the case of `exp_service_acc := false`, this altstep repeats and will keep waiting for what ki […]

    The SGSN (and this testcase) implemented Service Accept in the wrong way.

    If a UE wants to transfer data in PMM_IDLE (meaning it is attached, but doesn't has an active channel),
    the phone will do an Service Request.
    But the correct flow would be:

    (UE/RNC - SGSN)
    Service Req ->
    SecurityModeCommand <-
    SecurityModeCommandComplete ->

    There isn't a Service Accept, because it is implicit by the SecurityCommand.

    But if the phone is in PMM_CONNECTED, meaning it already has a active signalling channel it would be:

    Service Req ->
    Service Accept <-

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