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Mediant 2000 SIP User's Manual
Appendix I
Table I-1
below describes the mapping of ISDN release reason to SIP response.
page
229
describes the mapping of SIP response to ISDN release reason.
Table I-1: Mapping of ISDN Release Reason to SIP Response (continues on pages 227 to 228)
ISDN Release
Reason
1
Unallocated number
2
No route to network
3
No route to destination
6
Channel unacceptable
Call awarded and being delivered in an
7
established channel
16
Normal call clearing
17
User busy
18
No user responding
19
No answer from the user
20
Subscriber absent
21
Call rejected
22
Number changed w/o diagnostic
22
Number changed with diagnostic
23
Redirection to new destination
26
Non-selected user clearing
27
Destination out of order
28
Address incomplete
29
Facility rejected
30
Response to status enquiry
31
Normal unspecified
34
No circuit available
38
Network out of order
41
Temporary failure
42
Switching equipment congestion
43
Access information discarded
44
Requested channel not available
47
Resource unavailable
49
QoS unavailable
50
Facility not subscribed
55
Incoming calls barred within CUG
57
Bearer capability not authorized
58
Bearer capability not presently available
63
Service/option not available
65
Bearer capability not implemented
*
Messages and responses were created since the 'ISUP to SIP Mapping' draft doesn't specify their cause
code mapping.
Version 4.4
Release Reason Mapping
Description
SIP
Response
404
404
404
*
406
500
-*
486
408
480
480
403
410
410
480
404
502
484
501
501*
480
503
503
503
503
502*
503*
503
503*
503*
403
403
503
503*
501
227
I. Release Reason Mapping
Table I-2
Description
Not found
Not found
Not found
Not acceptable
Server internal error
BYE
Busy here
Request timeout
Temporarily unavailable
Temporarily unavailable
Forbidden
Gone
Gone
Temporarily unavailable
Not found
Bad gateway
Address incomplete
Not implemented
Not implemented
Temporarily unavailable
Service unavailable
Service unavailable
Service unavailable
Service unavailable
Bad gateway
Service unavailable
Service unavailable
Service unavailable
Service unavailable
Forbidden
Forbidden
Service unavailable
Service unavailable
Not implemented
July 2005
on
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