Table Of Contents
Session Initiation Protocol Cause Code Mapping
Session Initiation Protocol Cause Code Mapping
Revised: July 28, 2009, OL-4366-13
A cause code identifies why a call is released. A Session Initiation Protocol (SIP) call can fail due to an internal failure event rather than in response to an event received from the telephone side. This is analogous to the IP Leg (H.323) Call Clearing section.
The following error codes are generated when the call is released by the SIP interface:
•
127 - Interworking, unspecified
–Acknowledgment not received on final or reliable provisional response to a SIP 'Invite' or 'Re-Invite' sent.
–When the Session Description Protocol (SDP) is not received in a SIP 'Ack' request and is expected.
–When 200 class response to an initial 'Invite' is sent or received and SDP is expected but not available.
•41 - Temporary failure
–Request timeout on initial SIP 'Invite' sent.
–Failure to interpret an ISUP attachment from a received SIP-T provisionable response.
•102 - Recovery of timer expiry
–Final response timeout when not sending a final response to an initial SIP 'Invite' within acceptable duration.
–No response to a 'Re-Invite' or 'Update' request sent during an active call.
Table H-1 maps standard cause codes to SIP response codes.
Table H-1 Standard Cause Codes Mapped to SIP Response Codes
Standard Cause Code
|
Description
|
SIP Response Code
|
Description
|
1
|
Unallocated Number
|
404
|
Not Found
|
2
|
No Route To Network
|
404
|
Not Found
|
3
|
No Route To Destination
|
404
|
Not Found
|
4
|
Vacant Code (ANSI)
|
404
|
Not Found
|
5
|
Misdialed Trunk Prefix (ANSI)
|
404
|
Not Found
|
8
|
0 Prefix Dialed But Not Allowed (ANSI)
|
488
|
Not Acceptable Here
|
9
|
1 Prefix Dialed But Not Allowed (ANSI)
|
488
|
Not Acceptable Here
|
10
|
1 Prefix Absent
|
488
|
Not Acceptable Here
|
16
|
Normal 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
603
|
Forbidden
Decline
|
22
|
Number Changed
|
410
|
Gone
|
22
|
Number Changed
|
301
|
Moved Permanently (Contact has number from diagnostic)
|
23
|
Redirection to New Destination
|
410
|
Gone
|
26
|
Nonselected User Clearing or Misrouted Ported Number
|
404
|
Not Found
|
27
|
Destination Out of Order
|
502
|
Bad Gateway
|
28
|
Address Incomplete
|
484
|
Address Incomplete
|
29
|
Facility Rejected
|
501
|
Not Implemented
|
31
|
Normal Unspecified
|
480
|
Temporarily 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
|
44
|
Requested Circuit Not Available
|
503
|
Service Unavailable
|
47
|
Resource Unavailable
|
503
|
Service Unavailable
|
55
|
Incoming Calls Barred with CUG
|
403
|
Forbidden
|
57
|
Bearer Capability Not Authorized
|
403
|
Forbidden
|
58
|
Bearer Capability Not Presently Available
|
503
|
Service Unavailable
|
63
|
Service/Option Not Available
|
503
|
Service Unavailable
|
65
|
Bearer Capability Not Implemented
|
488
|
Not Acceptable Here
|
69
|
Requested Facility Not Implemented
|
606
|
Not Acceptable
|
70
|
Only Restricted Digit Available
|
488
|
Not Acceptable Here
|
79
|
Service or Option Not Implemented
|
501
|
Not Implemented
|
87
|
User Not a Member of CUG
|
403
|
Forbidden
|
88
|
Incompatible Destination
|
503
|
Service Unavailable
|
95
|
Invalid Message
|
503
|
Service Unavailable
|
102
|
Recovery On Timer Expiry
|
504
|
Gateway Timeout
|
111
|
Protocol error
|
500
|
Server Internal Error
|
127
|
Interworking Unspecified
|
500
|
Server Internal Error
|
All Other Cause Codes
|
|
500
|
Server Internal Error
|
Table H-2 maps SIP response codes to standard cause codes.
Table H-2 SIP Response Code to Standard Cause Code Mapping
SIP Response Code
|
Description
|
Standard Cause Code
|
Description
|
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
|
409
|
Conflict
|
|
|
410
|
Gone
|
22
|
Number Changed (no diagnostic)
|
411
|
Length Required
|
|
|
413
|
Request Entry Too Long
|
127
|
Interworking Unspecified
|
414
|
Request URI Too Long
|
127
|
Interworking Unspecified
|
415
|
Unsupported Media Type
|
79
|
Service/Option Not Implemented
|
416
|
Unsupported URI Scheme
|
127
|
Interworking Unspecified
|
420
|
Bad Extension
|
127
|
Interworking Unspecified
|
421
|
Extension Required
|
127
|
Interworking Unspecified
|
423
|
Interval Too Brief
|
127
|
Interworking Unspecified
|
480
|
Temporarily Unavailable
|
18
|
User Not 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
|
Busy Here
|
487
|
Request Terminated
|
|
|
488
|
Not Acceptable
|
|
|
500
|
Server Internal Error
|
41
|
Temporary Failure
|
501
|
Not Implemented
|
79
|
Service/Option Not Implemented
|
502
|
Bad Gateway
|
38
|
Network Out of Order
|
503
|
Service Unavailable
|
41
|
Temporary Failure
|
504
|
Server Timeout
|
102
|
Recovery On Timer Expiry
|
505
|
Version Not Supported
|
127
|
Interworking Unspecified
|
513
|
Message Too Long
|
127
|
Interworking Unspecified
|
600
|
Busy Everywhere
|
17
|
Busy Here
|
603
|
Decline
|
21
|
Decline
|
604
|
Does Not Exist Anywhere
|
1
|
Unallocated Number
|
606
|
Not Acceptable
|
|
|
Any Other Status Code
|
|
31
|
Normal Unspecified
|
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