112SIP messages supported by the IP Phone 1140E
4xx Response--Request failure responses4xx ResponseSendReceiveComments400
Bad requestYes
Yes
The IP Phone E generates a Bad Request response for various failure conditions generally when a request is invalid, and a more specific error response does not apply Unauthorized
No
Yes
Receiving a 401 response results in the IP Phone E reissuing the request using HTTP digest authentication Payment required
No
Yes
See default handling Forbidden
No
Yes
See default handling Not found
Yes
Yes
The IP Phone E generates this response for requests to unknown users. Receiving this response falls through to the default handling Method not allowed
Yes
Yes
The IP Phone E sends this response to a known method if it is received
at a time when the IP Phone1140E is not prepared to handle or the request is missing necessary information. Receiving this response falls through to the default handling Not acceptable
Yes
Yes
The IP Phone E can send this response when receiving a REFER
request which has an unsupported
URI. Receiving this response falls through to the default handling Proxy authentication required
No
Yes
See 401.
408 Request timeout
No
Yes
See default handling Gone
No
Yes
See default handling.
SIP Firmware Release 1.1 for IP Phone E Administration
NN43113-300 Standard May Copyright © 2008, Nortel Networks
SIP responses
113413 Request entity too large
No
Yes
See default handling. The IP Phone
1140E does not automatically retry if a retry-after header is present Request---URL
too long
No
Yes
See default handling Unsupported
Media
Yes
Yes
The IP Phone E can send this response when an incorrect content-type is detected fora request.
Receiving this response falls through to the
default handling Bad ExtensionYes
Yes
The IP Phone E can respond with a 420 when checking required extensions of incoming requests.
When receiving a 420, see default handling. The IP Phone E does not retry the request Temporarily unavailable
No
Yes
See default handling Call leg/
transaction does not exist
Yes
Yes
Incoming requests are matched against existing dialogs. If a request appears to be in-dialog, but does not have an existing dialog, the IP Phone
1140E responds with a 481. For incoming 481 responses, the default
handling is used Loop detectedYes
Yes
Default handling is used when this response is received Too Many Hops
No
Yes
See default handling Address
Incomplete
No
Yes
See default handling Ambiguous
No
Yes
See default handling. The IP Phone
1140E does not attempt to retry the request.
SIP Firmware Release 1.1 for IP Phone E Administration
NN43113-300 Standard May Copyright © 2008, Nortel Networks
114SIP messages supported
by the IP Phone E Busy HereYes
Yes
The IP Phone E can respond with this if the user is on the IP Phone
1140E, and the IP Phone 1140E
has reached its maximum number of allowed calls and cannot present the incoming call to the user. When this message is received by the IP Phone
1140E an error is displayed and a busy tone is played Request Canceled
Yes
Yes
See default handling Not Acceptable
Yes
Yes
The response is used by the IP
Phone E when a failed media negotiation occurs Request Pending
Yes
Yes
The IP Phone E sends and
receive this message in GLAREconditions.
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