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Appendix A: Disconnection Causes
A-12
SIP Failure (cont.) SIP client error 411 The endpoint sent a SIP
Client Error 411 (Length
Required) response.
The server refuses to
accept the request
without a defined
Content Length.
SIP client error 413 The endpoint sent a SIP
Client Error 413
(Request Entity Too
Large) response.
The server is refusing to
process a request
because the request
entity is larger than the
server is willing or able
to process.
SIP client error 414 The endpoint sent a SIP
Client Error 414
(Request-URI Too
Long) response.
The server is refusing to
service the request
because the Request-
URI is longer than the
server is willing to
interpret.
SIP client error 420 The endpoint sent a SIP
Client Error 420 (Bad
Extension) response.
The server did not
understand the protocol
extension specified in a
Require header field.
Table A-1: Primary Disconnection Reasons (Continued)
Category Cause Message Description