User's Manual 526 Document #: LTRT-27045
Mediant 1000B Gateway & E-SBC
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
* Messages and responses were created because the ‘ISUP to SIP Mapping’ draft doesn’t
specify their cause code mapping.
24.8.3 Configuring ISDN-to-ISDN Release Cause Mapping
The Release Cause ISDN to ISDN table lets you configure up to 10 ISDN ITU-T Q.850
release cause code (call failure) to ISDN ITU-T Q.850 release cause code mapping rules.
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