User's Manual

4xx Response Send Receive Comments
maximum number of allowed calls
and cannot present the incoming
call to the user. When this
message is received by the
IP Deskphone an error is displayed
and a busy tone is played.
487 Request
Canceled
Yes Yes See default handling.
488 Not Acceptable Yes Yes
The response is used by the
IP Deskphone when a failed media
negotiation occurs.
491 Request
Pending
Yes Yes
The IP Deskphone sends and
receive this message in GLARE
conditions.
5xx Response—Server failure responses
5xx Response Send Receive Comments
500 Internal Server
Error
Yes Yes
The IP Deskphone can send this
response when a request is
received but the IP Deskphone
software is not in a correct state to
handle it. When receiving this
message the IP Deskphone
displays an error for the user.
501 Not
Implemented
No Yes See default handling.
502 Bad Gateway No Yes See default handling.
503 Service
Unavailable
Yes Yes
504 Gateway timeout No Yes See default handling.
505 Version Not
Supported
Yes Yes
SIP messages supported by the IP Deskphone
316 SIP Software for Avaya 1100 Series IP Deskphones-Administration November 2012
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