User's Manual

3xx Response Send Receive Comments
address in the Contact header
field.
4xx Response—Request failure responses
4xx Response Send Receive Comments
400 Bad request Yes Yes
The IP Deskphone generates a
400 Bad Request response for
various
failure conditions generally
when a request is invalid, and a
more specific error response does
not apply.
401 Unauthorized No Yes
Receiving a 401 response results
in the IP Deskphone re-issuing the
request using HTTP digest
authentication.
402 Payment
required
No Yes
See
Default error handling on
page 217
.
403 Forbidden No Yes
See
Default error handling on
page 217
.
404 Not found Yes Yes
The IP Deskphone generates this
response for requests to unknown
users. Receiving this response
falls through to the default
handling.
405 Method not
allowed
Yes Yes
The IP Deskphone ends this
response to a known method if it is
received at a time when the
IP Deskphone is not prepared to
handle or the request is missing
necessary information. Receiving
this response falls through to the
default handling.
406 Not acceptable Yes Yes
The IP Deskphone can send this
response when receiving a REFER
request which has an unsupported
URI. Receiving this response falls
through to the default handling.
SIP messages supported by the IP Deskphone
214 SIP Software for Avaya 1200 Series IP Deskphones-Administration September 2013
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