SS7-ISUP (Q.763) DSS1 (Q.931)
8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1
1 ext G F E D C B A 1 0 0 0 0 1 0 0 0 = 8
2 ext I I I I I I I 2 length
3 Diagnostic(s) (if any) 3 0/1 ext G F E D C B A
. ... 4 1 ext I I I I I I I
n ... 5 Diagnostic(s) (if any)
D C B A - A) Location
0 0 0 0 user (U)
0 0 0 1 private network serving the local user (LPN)
0 0 1 0 public network serving the local user (LN)
0 0 1 1 transit network (TN)
0 1 0 0 public network serving the remote user (RLN)
0 1 0 1 private network serving the remote user (RPN)
0 1 1 1 international network (INTL)
1 0 1 0 network beyond interworking point (BI)
1 1 0 0 reserved for national use
1 1 0 1 reserved for national use
1 1 1 0 reserved for national use
1 1 1 1 reserved for national use
All other values are spare.
E - spare
G F - Coding standard
0 0 - ITU-T standardized coding, as described below
0 1 - ISO/IEC standard (see Note)
1 0 - national standard (see Note)
1 1 - standard specific to identified location (see Note)
NOTE - These other coding standards should be used only when the desired
cause value cannot be represented with the ITU-T-standardized coding.
Bit8 - Extension indicator (ext.)
0 - octet continues through the next octet (e.g. octet 1 to 1a)
1 - last octet
I - Cause value
7 6 5 - class
Class (000): normal event
Class (001): normal event
Class (010): resource unavailable
Class (011): service or option not available
Class (100): service or option not implemented
Class (101): invalid message (e.g. parameter out of range)
Class (110): protocol error (e.g. unknown message)
Class (111): interworking
Class (000): normal event
| Test-set id. (CV_exceptions) | Code | Description |
|---|---|---|
| 1_UnallocatedNum | 1 - Unallocated (unassigned) number | |
| 2_NoRoutToSpecTN | 2 - No route to specified transit network | |
| 3_NoRouteToDesti | 3 - No route to destination | |
| 4_SendSIT | 4 - Send special information tone | |
| 5_MisTrunkPref | 5 - Misdialled trunk prefix | |
| 6_ChannelUnaccep | 6 - Channel unacceptable | |
| 7_CallAwarded | 7 - Call awarded and being delivered in an established channel | |
| 8_Preemption | 8 - Preemption | |
| 9_PreempForReuse | 9 - Preemption - circuit reserved for reuse |
16_NormCallClear 16 - Normal call clearing 17_UserBusy 17 - User busy 18_NoUserRespond 18 - No user responding 19_NoAnsFromUser 19 - No answer from user (user alerted) 20_SubscrAbsent 20 - Subscriber absent 21_CallRejected 21 - Call rejected 22_NumberChanged 22 - Number changed 23_RedirToNewDes 23 - Redirection to new destination 25_ExcRoutingErr 25 - Exchange routing error 26_NonSelUserClr 26 - Non-selected user clearing 27_DestUnavail 27 - Destination out of order 28_InvNumberForm 28 - Invalid number format (address incomplete) 29_FacilityRej 29 - Facility rejected 30_RespToSTATENQ 30 - Response to STATUS ENQUIRY 31_NormalUnspec 31 - Normal, unspecified Class (010): resource unavailable 34_NoCircuitAvai 34 - No circuit/channel available 38_NetwoOutOfOrd 38 - Network out of order 39_PermFrmMCoOOS 39 - Permanent frame mode connection out of service 40_PermFrmMCoOP 40 - Permanent frame mode connection operational 41_TempFailure 41 - Temporary failure 42_SwitEquipCong 42 - Switching equipment congestion 43_AccesInfDisca 43 - Access information discarded 44_ReqCircNotAva 44 - Requested circuit/channel not available 46_PrecedeCallBl 46 - Precedence call blocked 47_Unspecified 47 - Resource unavailable, unspecified Class (011): service or option not available 49_QOS-NotAvail 49 - Quality of service not available 50_ReqFacNotSubs 50 - Requested facility not subscribed 53_OCBarredWCUG 53 - Outgoing calls barred within CUG 55_ICBarredWCUG 55 - Incoming calls barred within CUG 57_BC-NotAuthori 57 - Bearer capability not authorized 58_BC-NotPresAva 58 - Bearer capability not presently available 62_Inconsistency 62 - Inconsistency in designated outgoing access information and subscriber class 63_Unspecified 63 - Service or option not available, unspecified Class (100): service or option not implemented 65_BC-NotImpleme 65 - Bearer capability not implemented 66_ChanTypNotImp 66 - Channel type not implemented 69_ReqFacNotImpl 69 - Requested facility not implemented 70_RDIBCAvail 70 - Only restricted digital information bearer capability is available 79_unspec 79 - Service or option not implemented, unspecified Class (101): invalid message (e.g. parameter out of range) 81_InvCallRefVal 81 - Invalid call reference value 82_IdenChNotExis 82 - Identified channel does not exist 83_SuspCallExist 83 - A suspended call exists, but this call identity does not 84_CallIdenInUse 84 - Call identity in use 85_NoCallSuspend 85 - No call suspended 86_ReqCallIdClr 86 - Call having the requested call identity has been cleared 87_NotMembOfCUG 87 - User not member of CUG 88_IncompatiDest 88 - Incompatible destination 90_Non-existCUG 90 - Non-existent CUG 91_InvTranNetSel 91 - Invalid transit network selection 95_Unspecified 95 - Invalid message, unspecified Class (110): protocol error (e.g. unknown message) 96_MandatIEMiss 96 - Mandatory information element is missing 97_MsgTypeNoExis 97 - Message type non-existent or not implemented 98_MsgNotCompati 98 - Message not compatible with call state or message type non-existent or not implemented 99_IE-NonExist 99 - Information element /parameter non-existent or not implemented 100_InvIECont 100 - Invalid information element contents 101_MsgNotComp 101 - Message not compatible with call state 102_TimerExpiry 102 - Recovery on timer expiry 103_ParNonExist 103 - Parameter non-existent or not implemented, passed on 110_MsgDiscard 110 - Message with unrecognized parameter, discarded 111_ProtErrUnsp 111 - Protocol error, unspecified Class (111): interworking 127_Unspecified 127 - Interworking, unspecified