Cause codes and definition

Last Updated : Feb 26, 2020 |
Prolog information
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Cause Code
Definition
0
Unknown.
1
Unallocated (unassigned) number.
2
No route to specific transit network/(5ESS)Calling party off hold.
3
No route to destination / (5ESS) Calling party dropped while on hold.
4
Send special information tone / (NI-2) Vacant Code..
5
Misdialed trunk prefix.
6
Channel unacceptable.
7
Call awarded and being delivered.
8
Preemption/(NI-2)Prefix 0 dialed in error.
9
Preemption, cct reserved / (NI-2) Prefix 1 dialed in error.
10
(NI-2) Prefix 1 not dialed.
11
(NI-2) Excessive digits received call proceeding.
16
Normal call clearing.
17
User busy.
18
No user responding / No response from remote device.
19
No answer from user.
20
Subscriber absent (wireless networks).
21
Call rejected.
22
Number changed.
23
Redirection to new destination.
25
Exchange routing error.
26
Non-selected user clearing.
27
Destination Out Of Order.
28
Invalid number format.
29
Facility rejected.
30
Response to STATUS ENQUIRY.
31
Normal, unspecified.
34
No cct / channel available.
38
Network out of order.
39
Permanent frame mode connection out of service.
40
Permanent frame mode connection is operational.
41
Temporary failure.
42
Switching equipment congestion.
43
Access information discarded
44
Requested cct / channel not available
45
Pre-empted
46
Precedence blocked call
47
Resources unavailable/(5ESS)New destination
49
Quality of service unavailable
50
Requested facility not subscribed
52
Outgoing calls barred.
54
Incoming calls barred
57
Bearer capability not authorised.
58
Bearer capability not presently available.
63
Service or option not available, unspecified.
65
Bearer capability not implemented.
66
Channel type not implemented.
69
Requested facility not implemented.
70
Only restricted digital bearer capability is available.
79
Service or option not implemented, unspecified.
81
Invalid call reference.
82
Identified channel does not exist.
83
A suspended call exists, but this id does not.
84
Call id in use.
85
No call suspended.
86
Call having the requested id has been cleared.
87
User not a member of Closed User Group.
88
Incompatible destination.
90
Non-existent Closed User Group.
91
Invalid transit network selection.
95
Invalid message, unspecified.
96
Mandatory information element missing.
97
Message type non-existent/not implemented.
98
Message not compatible with call state, non-existent or not implemented.
99
Information element non-existent or not implemented.
100
Invalid information element contents.
101
Message not compatible with call state / (NI-2) Protocol threshold exceeded.
102
Recovery on timer expiry.
IP Office Specific Cause Codes
103
Parameter not implemented.
110
Message with unrecognised parameter
111
Protocol error, unspecified
117
Parked (Internal system code).
118
UnParked (Internal system code).
119
Pickup (Internal system code).
120
Reminder (Internal system code).
121
Redirect (Internal system code).
122
Call Barred (Internal system code).
123
Forward To Voicemail (Internal system code).
124
Answered By Other (Internal system code).
125
No Account Code (Internal system code).
126
Transfer (Internal system code).
129
Held Call (Internal system code).*
130
Ring Back Check (Internal system code).*
131
Appearance Call Steal (Internal system code).*
132
Appearance Bridge Into (Internal system code).*
133
Bumped Call (Internal system code).*
134
Line Appearance Call (Internal system code).+
135
Unheld Call (Internal system code).+
136
Replace Current Call (Internal system code).+
137
Glare (Internal system code).+
138
R21 Compatible Conf Move (Internal system code).+
139
RingBack Answered (Internal system code).+
140
Transfer Request Failed (Internal system code).+
141
HuntGroup Drop (Internal system code).+
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