User`s manual

SIP User's Manual B. SIP Compliance Tables
Version 5.0 347 December 2006
B.5.5 5xx Response – Server Failure Responses
Table B-9: 5xx SIP Responses
5xx Response Comments
500 Internal Server Error
501 Not Implemented
502
Bad gateway
503 Service Unavailable
504 Gateway Timeout
505 Version Not Supported
On reception of any of these Responses, the GW
releases the call, sending appropriate release cause
to PSTN side.
The GW generates 5xx response according to PSTN
release cause coming from PSTN.
B.5.6 6xx Response – Global Responses
Table B-10: 6xx SIP Responses
6xx Response Comments
600 Busy Everywhere
603 Decline
604 Does Not Exist Anywhere
606 Not Acceptable
On reception of any of these Responses, the GW
releases the call, sending appropriate release cause
to PSTN side.