User`s manual

SIP User's Manual H. Release Reason Mapping
Version 5.0 381 October 2006
Table H-1: Mapping of ISDN Release Reason to SIP Response
(continues on pages 380 to 381)
ISDN Release
Reason
Description
SIP
Response
Description
65
Bearer capability not implemented
501
Not implemented
66
Channel type not implemented
480*
Temporarily unavailable
69
Requested facility not implemented
503*
Service unavailable
70
Only restricted digital information bearer
capability is available
503*
Service unavailable
79
Service or option not implemented
501
Not implemented
81
Invalid call reference value
502*
Bad gateway
82
Identified channel does not exist
502*
Bad gateway
83
Suspended call exists, but this call identity
does not
503*
Service unavailable
84
Call identity in use
503*
Service unavailable
85
No call suspended
503*
Service unavailable
86
Call having the requested call identity has
been cleared
408*
Request timeout
87
User not member of CUG
503
Service unavailable
88
Incompatible destination
503
Service unavailable
91
Invalid transit network selection
502*
Bad gateway
95
Invalid message
503
Service unavailable
96
Mandatory information element is missing
409*
Conflict
97
Message type non-existent or not
implemented
480*
Temporarily not
available
98
Message not compatible with call state or
message type non-existent or not
implemented
409*
Conflict
99
Information element non-existent or not
implemented
480*
Not found
100
Invalid information elements contents
501*
Not implemented
101
Message not compatible with call state
503*
Service unavailable
102
Recovery of timer expiry
408
Request timeout
111
Protocol error
500
Server internal error
127
Interworking unspecified
500
Server internal error