3Com VCX V7122 User Manual page 233

A
PPENDIX
Table 48 below describes the mapping of ISDN release reason to SIP response.
page 235 describes the mapping of SIP response to ISDN release reason.
Table 48 Mapping of ISDN Release Reason to SIP
ISDN Release
Description
Reason
1 Unallocated number
2 No route to network
3 No route to destination
6 Channel unacceptable
Call awarded and being delivered
7
in an 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
3Com VCX V7122 SIP VoIP Gateway User Manual
I: R
ELEASE
R M
EASON
SIP
Description
Response
404 Not found
404 Not found
404 Not found
406* Not acceptable
-* BYE
486 Busy here
408 Request timeout
480 Temporarily unavailable
480 Temporarily unavailable
403 Forbidden
410 Gone
410 Gone
480 Temporarily unavailable
404 Not found
502 Bad gateway
484 Address incomplete
501 Not implemented
501* Not implemented
480 Temporarily unavailable
503 Service unavailable
503 Service unavailable
APPING
Table 49 on
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