Phone BehaviorDescriptionHTTP Status Code
CThe request cannot be fulfilled due to bad
syntax.
400 Bad Request
Immediately retry request with
authentication credentials.
Maximum 2 retries. Upon failure,
the phone behavior is C.
Basic or digest access authentication
challenge.
401 Unauthorized
CServer refuses to respond.403 Forbidden
BRequested resource not found. Subsequent
requests by client are permissible.
404 Not Found
Immediately retry request with
authentication credentials.
Maximum two retries. Upon failure,
the phone behavior is C.
Basic or digest access authentication
challenge.
407 Proxy
Authentication
Required
COther client error status codes are not
processed.
4xx
Phone behavior is C.Generic error message.500 Internal Server
Error
Phone behavior is C.The server does not recognize the request
method, or it lacks the ability to fulfill the
request.
501 Not Implemented
Phone behavior is C.The server is acting as a gateway or proxy
and receives an invalid response from the
upstream server.
502 Bad Gateway
Phone behavior is C.The server is currently unavailable
(overloaded or down for maintenance). This
is a temporary state.
503 Service
Unavailable
CThe server behaves as a gateway or proxy and
does not receive timely response from the
upstream server.
504 Gateway Timeout
COther server error5xx
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
37
Cisco IP Phone Provisioning
HTTP Status Code Handling on Resync and Upgrade