Nortel Networks Mediant TP-1610 SIP - Manual (Page 227)

Mediant 2000 SIP User’s Manual I. Release Reason Mapping
Version 4.4 227 July 2005
Appendix I Release Reason Mapping
Table I-1 below describes the mapping of ISDN release reason to SIP response. Table I-2 on
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
Description
SIP
Response
Description
1 Unallocated number 404 Not found
2 No route to network 404 Not found
3 No route to destination 404 Not found
6 Channel unacceptable
406
*
Not acceptable
7
Call awarded and being delivered in an
established channel
500 Server internal error
16 Normal call clearing - * BYE
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 w/o diagnostic 410 Gone
22 Number changed with diagnostic 410 Gone
23 Redirection to new destination 480 Temporarily unavailable
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 501 Not implemented
30 Response to status enquiry 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
43 Access information discarded 502 * Bad gateway
44 Requested channel not available 503 * Service unavailable
47 Resource unavailable 503 Service unavailable
49 QoS unavailable 503 * Service unavailable
50 Facility not subscribed 503 * Service unavailable
55 Incoming calls barred within 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 501 Not implemented
*
Messages and responses were created since the ‘ISUP to SIP Mapping’ draft doesn’t specify their cause
code mapping.