Appendix A-Disconnection Causes

Table A-1Call Disconnection Causes (Continued)

Disconnection Cause

Description

 

 

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

The participant's endpoint was contacted

available

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

The endpoint did not respond in the given time

respond in the given time

frame.

frame

 

 

 

SIP trans error TCP Invite

A SIP Invite was sent via TCP, but the endpoint

 

was not found.

 

 

A-8

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Polycom 2000/4000 manual Disconnection Cause Description