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Chapter A-Disconnection Causes
Polycom, Inc. A-5
SIP forbidden The SIP server rejected the request.
The server understood the request, but is refusing to
fulfill it.
SIP global failure 603 A SIP Global Failure 603 (Decline) response was
returned.
The participant's endpoint was successfully contacted,
but the participant explicitly does not wish to or cannot
participate.
SIP global failure 604 A SIP Global Failure 604 (Does Not Exist Anywhere)
response was returned.
The server has authoritative information that the user
indicated in the Request-URI does not exist anywhere.
SIP global failure 606 A SIP Global Failure 606 (Not Acceptable) response
was returned.
SIP gone The requested resource is no longer available at the
Server and no forwarding address is known.
SIP moved permanently The endpoint moved permanently. The user can no
longer be found at the address in the Request-URI.
SIP moved temporarily The remote endpoint moved temporarily.
SIP not found The endpoint was not found.
The server has definitive information that the user does
not exist at the domain specified in the Request-URI.
SIP redirection 300 A SIP Redirection 300 (Multiple Choices) response was
returned.
SIP redirection 305 A SIP Redirection 305 (Use Proxy) response was
returned.
The requested resource MUST be accessed through the
proxy given by the Contact field.
SIP redirection 380 A SIP Redirection 380 (Alternative Service) response
was returned.
The call was not successful, but alternative services are
possible.
SIP remote cancelled call The endpoint canceled the call.
SIP remote closed call The endpoint ended the call.
SIP remote stopped responding The endpoint is not responding.
SIP remote unreachable The endpoint could not be reached.
SIP request terminated The endpoint terminated the request.
The request was terminated by a BYE or CANCEL
request.
SIP request timeout The request was timed out.
Table A-1 Call Disconnection Causes (Continued)
Disconnection Cause Description