ISDN Disconnection Cause
This source of this ISDN cause is from ETS 300 102-1 Annex G. You can download the complete ETS 300 102-1 standard, the layer 3 basic call control, from the site www.etsi.org.
Normal Class
Code | Disconnection Cause |
1 | Unallocated |
2 | No route to specified transit network |
3 | No route to destination |
6 | Channel unacceptable |
7 | Call awarded and being delivered in an established channel |
16 | Nomal call clearing |
17 | User busy |
18 | No user responding |
19 | No answer from user (user alerted) |
21 | Call rejected |
22 | Number changed |
27 | Destination out of order |
28 | Invalid formate (address incomplete) |
29 | Facility rejected |
30 | Response to status enquiry |
31 | Normal, unspecified |
Resource Unavailable Class
34 | No circuit/channel available |
38 | Network out of order |
41 | Temporary failure |
42 | Switching equipment congestion |
43 | Access information discarded |
44 | Request circuit/channel not available |
47 | Resource unavailable, unspecified |
Service or Option not Available Class
49 | Quality of service not available |
50 | Requested facility not subscribed |
57 | Bearer capability not authorized |
58 | Bearer capability not presently available |
63 | Serice or option not available, unspecified |
Service or Option not Implemented Class
65 | Bearer capability not implemented |
66 | Channel type not implemented |
69 | Requested facility not implemented |
70 | Only restricted digital information bearer capability is unavailable |
79 | Service option not implemented, unspecified |
Invalid Message (e.g., parameter out of range) Class
81 | Invalid call reference value |
82 | Identified channel does not exist |
83 | A suspended call exist, but this call identify |
84 | Call identity in use |
85 | No call suspended |
86 | Call having the requested call identity has been cleared |
88 | Incompatible destination |
91 | Invalid transit network selection |
95 | Invalid message, unspecified |
Protocol Error (e.g., unknown message) Class
96 | Mandatory information element is missing |
97 | Message type non-existent or not implemented |
98 | Message not compatible with call state or message type non-existent or not implemented |
99 | Information element non-existent or not implemented |
100 | Invliad information element contents |
101 | Message not compatible with call state |
102 | Recovery on timer expiry |
111 | Protocol error, unspecified |
Interworking Class
127 | Interworking unspecified |
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