Default SIP-to-SS7 ISUP Cause Codes
Hello Guys, today i am going to share a very informative chart with you. Most of you, who are in VoIP or Telecommunications field, they would know how helpful this chart is. Most of the time, we VoIP engineers need this chart to dig different sort of problem in VoIP/ Telecom Network. This chart is the property of http://www.dialogic.com
Please feel free to let me know your questions and confusions.
Please feel free to let me know your questions and confusions.
Default SIP-to-SS7 ISUP Cause Codes
ISUP Cause Value
|
SIP Response
|
Normal event
| |
1 – unallocated number
|
404 Not Found
|
2 – no route to network
|
404 Not Found
|
3 – no route to destination
|
404 Not Found
|
16 – normal call clearing
|
--- (*)
|
17 – user busy
|
486 Busy here
|
18 – no user responding
|
408 Request Timeout
|
19 – no answer from the user
|
480 Temporarily unavailable
|
20 – subscriber absent
|
480 Temporarily unavailable
|
21 – call rejected
|
403 Forbidden (+)
|
22 – number changed (s/ o diagnostic)
|
410 Gone
|
22 – number changed ( w/ diagnostic)
|
301 Moved permanently
|
23 – redirection to new destination
|
410 Gone
|
26 – non-selected user clearing
|
404 Not Found (=)
|
27 – destination out of order
|
502 Bad Gateway
|
28 – address incomplete
|
484 Address incomplete
|
29 – facility rejected
|
510 Not implemented
|
31 – normal unspecified
|
480 Temporarily unavailable Resource unavailable
|
34 – no circuit available
|
503 Service unavailable
|
38 – network out of order
|
503 Service unavailable
|
41 – temporary failure
|
503 Service unavailable
|
42 – switching equipment congestion
|
503 Service unavailable
|
47 – resource unavailable
|
503 Service unavailable Service or option not available
|
55 – incoming calls barred within CUG
|
403 Forbidden
|
57 – bearer capability not authorized
|
403 Forbidden
|
58 – bearer capability not presently available
|
503 Service unavailable
|
65 – bearer capability not implemented
|
488 Not Acceptable here
|
70 – Only restricted digital information bearer capability is available (National use)
|
488 Not Acceptable here
|
79 – service or option not implemented
|
501 Not implemented
|
Invalid message
| |
87 – user not member of CUG
|
403 Forbidden
|
88 – incompatible destination
|
503 Service unavailable
|
102 – Call Setup Time-out Failure
|
504 Gateway timeout
|
111 – Protocol Error Unspecified
|
500 Server internal error Interworking
|
127 – Internal Error - interworking unspecified
|
500 Server internal error
|
500 – Server internal error (default)
| |
(*) ISDN Cause 16 will usually result in a BYE or CANCEL
(+) If the cause location is ‘user’ than the 6xx code could be given rather than the 4xx code. the cause value received in the H.225.0 message is unknown in ISUP, the unspecified cause value of the class is sent.
(=) ANSI procedure
SIP Status Code to ISDN Cause Code Mapping
Response received Cause value in the REL
400 – Bad Request 41 – Temporary failure
401 – Unauthorized 21 – Call rejected (*)
402 – Payment required 21 – Call rejected
403 – Forbidden 21 – Call rejected
404 – Not Found 1 – Unallocated number
405 – Method not allowed 63 – Service or option unavailable
406 – Not acceptable 79 – Service/option not implemented (+)
407 – Proxy authentication required 21 – Call rejected (*)
408 – Request timeout 102 – Recovery on timer expiry
410 – Gone 22 – Number changed (w/o diagnostic)
413 – Request Entity too long 127 – Interworking (+)
414 – Request –URI too long 127 – Interworking (+)
415 – Unsupported media type 79 – Service/option not implemented (+)
416 – Unsupported URI Scheme 127 – Interworking (+)
402 – Bad extension 127 – Interworking (+)
421 – Extension Required 127 – Interworking (+)
423 – Interval Too Brief 127 – Interworking (+)
480 – Temporarily unavailable 18 – No user responding
481 – Call/Transaction Does not Exist 41 – Temporary Failure
482 – Loop Detected 25 – Exchange – routing error
483 – Too many hops 25 – Exchange – routing error
484 – Address incomplete 28 – Invalid Number Format (+)
485 – Ambiguous 1 – Unallocated number
486 – Busy here 17 – User Busy
487 – Request Terminated --- (no mapping)
488 – Not Acceptable here --- by warning header
500 – Server internal error 41 – Temporary Failure
501 – Not implemented 79 – Not implemented, unspecified
502 – Bad gateway 38 – Network out of order
503 – Service unavailable 41 – Temporary Failure
504 – Service time-out 102 – Recovery on timer expiry
505 – Version Not supported 127 – Interworking (+)
513 – Message Too Large 127 – Interworking (+)
600 – Busy everywhere 17 – User busy
603 – Decline 21 – Call rejected
604 – Does not exist anywhere 1 – Unallocated number
606 – Not acceptable --- by warning header
