xx Response--Server failure responses

SIP header fields
115
6xx Response--Global responses
6xx Response
Send
Receive
Comments
600 Busy Everywhere
Yes
Yes
The IP Phone E can send this response when the IGNORE setting is set to NETWORK, and the user chooses to ignore an incoming call.
When received, this response falls through the default handling Decline
Yes
Yes
The IP Phone E can send this response when the user declines an incoming call. An optional reason can be supplied Does Not Exist
Anywhere
No
Yes
See default handling Not Acceptable
No
Yes
See default handling.
Default error handling
All 4xx/5xx/6xx responses (with the exception of 401/407) received by the
IP Phone E when attempting to initiate a call result in the display of an error on the screen, and typically results in fast or regular busy tone.
If a media negotiation fails during dialog setup, the IP Phone 1140E
terminates the dialog.
If an in-dialog failure occurs during media (renegotiation, the IP Phone
1140E falls back to previously negotiated media settings. When a failure occurs that makes this impossible, the IP Phone E attempts to clear the call by terminating the dialog.

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