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Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
A-6 Polycom, Inc.
SIP server error 500 The SIP server sent a SIP Server Error 500 (Server
Internal Error) response.
The server encountered an unexpected condition that
prevented it from fulfilling the request.
SIP server error 501 The SIP server sent a SIP Server Error 501 (Not
Implemented) response.
The server does not support the functionality required to
fulfill the request.
SIP server error 502 The SIP server sent a SIP Server Error 502 (Bad
Gateway) response.
The server, while acting as a gateway or proxy, received
an invalid response from the downstream server it
accessed in attempting to fulfill the request.
SIP server error 503 The SIP server sent a SIP Server Error 503 (Service
Unavailable) response.
The server is temporarily unable to process the request
due to a temporary overloading or maintenance of the
server.
SIP server error 504 The SIP server sent a SIP Server Error 504 (Server
Time-out) response.
The server did not receive a timely response from an
external server it accessed in attempting to process the
request.
SIP server error 505 The SIP server sent a SIP Server Error 505 (Version Not
Supported) response.
The server does not support, or refuses to support, the
SIP protocol version that was used in the request.
SIP temporarily not available The participant's endpoint was contacted successfully
but the participant is currently unavailable (e.g., not
logged in or logged in such a manner as to preclude
communication with the participant).
SIP remote device did not respond in the
given time frame
The endpoint did not respond in the given time frame.
SIP trans error TCP Invite A SIP Invite was sent via TCP, but the endpoint was not
found.
SIP transport error Unable to initiate connection with the endpoint.
SIP unauthorized The request requires user authentication.
SIP unsupported media type The server is refusing to service the request because
the message body of the request is in a format not
supported by the requested resource for the requested
method.
Table A-1 Call Disconnection Causes (Continued)
Disconnection Cause Description