Polycom RMX 1500 Administrator's Manual page 856

Appendix A-Disconnection Causes
A-8
Table A-1 Call Disconnection Causes (Continued)
Disconnection Cause
SIP server error 501
SIP server error 502
SIP server error 503
SIP server error 504
SIP server error 505
SIP temporarily not
available
SIP remote device did not
respond in the given time
frame
SIP trans error TCP Invite
Description
The SIP server sent a SIP Server Error 501 (Not
Implemented) response.
The server does not support the functionality
required to fulfill the request.
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.
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.
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.
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.
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).
The endpoint did not respond in the given time
frame.
A SIP Invite was sent via TCP, but the endpoint
was not found.