信令网_gsm主叫信令流程图_被叫信令(2)

17 User busy

18 No user responding

19 User alerting, no answer

21 Call rejected

22 Number changed

26 Non selected user clearing

27 Destination out of order

28 Invalid number format (incomplete number)

29 Facility rejected

30 Response to STATUS ENQUIRY

31 Normal, unspecified

34 No circuit/channel available

38 Network out of order

41 Temporary failure

42 Switching equipment congestion

43 Access information discarded

44 Requested circuit/Channel not available

47 Resources unavailable, unspecified

49 Quality of service unavailable

50 Requested facility not subscribed

55 Incoming calls barred within the CUG

57 Bearer capability not authorized

58 Bearer capability not presently available

63 Sevice or option not available, unspecified

65 Bearer service not implemented

69 Requested facility not implemented

70 Only restricted digital information bearer

capability is available

79 Service or option not implemented, unspecified

81 Invalid transaction indentifier value

87 User not member of CUG

88 Incompatible destination

91 Invalid transit network selection

95 Semantically incorrect message NEMO TECHNOLOGIES 233

96 Invalid mandatory information

97 Message type not non-existent

98 Message type not compatible with protocol state

99 Information element non existent or not implemented

100 Conditional IE error

101 Message not compatible with protocol state

102 Recovery on timer expiry

111 Protocol error, unspecified

127 Interworking, unspecified

4 CAF(Call Failed) 5 2 -1

State: Test system failure,参考CAD(Call Disconnect) 第一项

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