Causes for disconnection

/* Causes for disconnection (from Q.931) */#define AST_CAUSE_UNALLOCATED 1#define AST_CAUSE_NO_ROUTE_TRANSIT_NET 2#define AST_CAUSE_NO_ROUTE_DESTINATION 3#define AST_CAUSE_CHANNEL_UNACCEPTABLE 6#define AST_CAUSE_CALL_AWARDED_DELIVERED 7#define AST_CAUSE_NORMAL_CLEARING 16#define AST_CAUSE_USER_BUSY 17#define AST_CAUSE_NO_USER_RESPONSE 18#define AST_CAUSE_NO_ANSWER 19#define AST_CAUSE_CALL_REJECTED 21#define AST_CAUSE_NUMBER_CHANGED 22#define AST_CAUSE_DESTINATION_OUT_OF_ORDER 27#define AST_CAUSE_INVALID_NUMBER_FORMAT 28#define AST_CAUSE_FACILITY_REJECTED 29#define AST_CAUSE_RESPONSE_TO_STATUS_ENQUIRY 30#define AST_CAUSE_NORMAL_UNSPECIFIED 31#define AST_CAUSE_NORMAL_CIRCUIT_CONGESTION 34#define AST_CAUSE_NETWORK_OUT_OF_ORDER 38#define AST_CAUSE_NORMAL_TEMPORARY_FAILURE 41#define AST_CAUSE_SWITCH_CONGESTION 42#define AST_CAUSE_ACCESS_INFO_DISCARDED 43#define AST_CAUSE_REQUESTED_CHAN_UNAVAIL 44#define AST_CAUSE_PRE_EMPTED 45#define AST_CAUSE_FACILITY_NOT_SUBSCRIBED 50#define AST_CAUSE_OUTGOING_CALL_BARRED 52#define AST_CAUSE_INCOMING_CALL_BARRED 54#define AST_CAUSE_BEARERCAPABILITY_NOTAUTH 57#define AST_CAUSE_BEARERCAPABILITY_NOTAVAIL 58#define AST_CAUSE_BEARERCAPABILITY_NOTIMPL 65#define AST_CAUSE_CHAN_NOT_IMPLEMENTED 66#define AST_CAUSE_FACILITY_NOT_IMPLEMENTED 69#define AST_CAUSE_INVALID_CALL_REFERENCE 81#define AST_CAUSE_INCOMPATIBLE_DESTINATION 88#define AST_CAUSE_INVALID_MSG_UNSPECIFIED 95#define AST_CAUSE_MANDATORY_IE_MISSING 96#define AST_CAUSE_MESSAGE_TYPE_NONEXIST 97#define AST_CAUSE_WRONG_MESSAGE 98#define AST_CAUSE_IE_NONEXIST 99#define AST_CAUSE_INVALID_IE_CONTENTS 100#define AST_CAUSE_WRONG_CALL_STATE 101#define AST_CAUSE_RECOVERY_ON_TIMER_EXPIRE 102#define AST_CAUSE_MANDATORY_IE_LENGTH_ERROR 103#define AST_CAUSE_PROTOCOL_ERROR 111#define AST_CAUSE_INTERWORKING 127/* Special Asterisk aliases */#define AST_CAUSE_BUSY AST_CAUSE_USER_BUSY#define AST_CAUSE_FAILURE AST_CAUSE_NETWORK_OUT_OF_ORDER#define AST_CAUSE_NORMAL AST_CAUSE_NORMAL_CLEARING#define AST_CAUSE_NOANSWER AST_CAUSE_NO_ANSWER#define AST_CAUSE_CONGESTION AST_CAUSE_NORMAL_CIRCUIT_CONGESTION#define AST_CAUSE_UNREGISTERED AST_CAUSE_NO_ROUTE_DESTINATION#define AST_CAUSE_NOTDEFINED 0