ISDN Cause codes (Q.850 & Q.931 unless specified) | SIP/PJSIP | Motif |
|---|---|---|
Cause not defined |
|
|
| 404, 485, 604 |
|
2. No route to specified transmit network |
|
|
3. No route to destination | 420 |
|
5. Misdialled trunk prefix (national use) |
|
|
6. Channel unacceptable |
|
|
7. Call awarded and being delivered in an established channel |
|
|
ISUP - 8. Preemption |
|
|
14. QoR: ported number |
|
|
16. Normal Clearing |
| gone, success |
17. User busy | 486, 600 | busy |
18. No user responding | 408 | expired |
19. No answer from user (user alerted) | 480, 483 |
|
20. Subscriber absent |
|
|
21. Call Rejected | 401, 403, 407, 603 | cancel, decline |
22. Number changed | 410 |
|
23. Redirected to new destination |
|
|
26. Non-selected user clearing (ASTERISK-15057) |
|
|
27. Destination out of order | 502 |
|
28. Invalid number format | 484 |
|
29. Facility rejected | 501 |
|
30. Response to STATUS ENQUIRY |
|
|
31. Normal, unspecified |
|
|
34. No circuit/channel available (Note that we've called this "Circuit/channel congestion" for a while which can cause confusion with code 42) |
| general-error |
38. Network out of order | 500 |
|
41. Temporary failure | 409 |
|
42. Switching equipment congestion | 5xx | failed-application |
43. Access information discarded |
|
|
44. Requested circuit/channel not available |
|
|
50. Requested facility not subscribed |
|
|
52. Outgoing call barred |
|
|
54. Incoming call barred |
|
|
57. Bearer capability not authorized |
|
|
58. Bearer capability not presently available | 488, 606 | incompatible-parameters, media-error, unsupported-applications |
65. Bearer capability not implemented |
|
|
66. Channel type not implemented |
|
|
69. Requested facility not implemented |
| unsupported-transports |
81. Invalid call reference value |
|
|
88. Incompatible destination |
|
|
95. Invalid message unspecified |
|
|
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 nonexistent or not implemented |
|
|
100. Invalid information element contents |
|
|
101. Message not compatible with call state |
|
|
102. Recover on timer expiry | 504 | timeout |
? Mandatory IE length error |
|
|
111. Protocol error, unspecified |
| failed-transport, security-error |
127. Interworking, unspecified | 4xx, 505, 6xx | connectivity-error |
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