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Appendix A SIP Compliance with RFC-2543 Information
SIP Responses
A-8
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
411 Length
Required
See comments This response is only received by the
phone in this release.
This response indicates that the user
refuses to accept the request without a
defined content length. If received the
phone resends the INVITE request if it
can add a valid Content-Length header
field.
413 Request Entity
Too Large
See comments This response is only received by the
phone in this release.
If a retry after header field is contained
in this response, then the user can
attempt the call once again in the retry
time provided.
414
Request—URL
Too Long
See comments This response is only received by the
phone in this release. The user is notified
if this response is received.
415 Unsupported
Media
See comments This response is only received by the
phone in this release. The user is notified
if this response is received.
420 Bad Extension See comments This response is only received by the
phone in this release. The user is notified
if this response is received.
If the phone does not understand the
protocol extension specified in the
Require field, the 420 Bad Extension
response is generated.
4xx Response Supported? Comments