AudioCodes Mediant 800B - Configuring ISDN-To-ISDN Release Cause Mapping

Version 7.2 579 Mediant 800B Gateway & E-SBC
User's Manual 25. Manipulation
ISDN Release
Reason
Description
SIP
Response
Description
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
90 Non-Existent CUG 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
103
Parameter Non-Existent Or Not
Implemented - Passed On
400 Bad Request
111 Protocol error 500 Server internal error
112 Uknown Error 400 Bad Request
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.
25.8.3 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.
In other words, it lets you change the originally received ISDN cause code to a different
ISDN cause code. For example, the PSTN may indicate disconnected calls (hang up) by
sending cause code 127. However, you can change the cause code to 16, which is a more
typical cause code for such call scenarios. When the device receives an ISDN cause code
from the PSTN side, it searches the table for a matching ISDN cause code. If found, the
device changes the cause code to the corresponding ISDN cause code. If the ISDN cause