3Com VCX V7111, User Manual

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3Com
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VCX V7111 VoIP Gateway User Guide
4xx Response Supported Comments
485 Ambiguous Yes The gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
486 Busy Here Yes The SIP gateway generates this response if the called party is off
hook and the call cannot be presented as a call waiting call. On
receiving this response, the gateway notifies the User and
generates a busy tone.
487 Request
Canceled
Yes This response indicates that the initial request is terminated with
a BYE or CANCEL request.
488 Not Acceptable Yes The gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
5xx Response – Server Failure Responses
Table 112
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.
6xx Response – Global Responses
Table 113
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.