No circuit available Network out of order No route to destination Channel unacceptable Operator determined barring Normal call clearing No user responding User alerting, no answer Call rejected Number changed Pre-emption Destination out of order Invalid number format (incomplete number) Facility rejected Response to STATUS ENQUIRY Normal, unspecified Temporary failure Switching equipment congestion Access information discarded Requested circuit/channel not available Resources unavailable or unspecified Quality of service unavailable Requested facility not subscribed Incoming calls barred within the CUG Bearer capability not authorised Bearer capability not presently available Service or option not available or unspecified Bearer service not implemented Requested facility not implemented Only restricted digital information bearer capability is available Service or option not implemented or unspecified Invalid transaction identifier value User not member of CUG Incompatible destination Invalid transit network selection Semantically incorrect message Message type not compatible with protocol state Information element non-existent or not implemented Conditional IE error Recovery on timer expiry Protocol error, unspecified Interworking, unspecified