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Appendix A: Disconnection Causes
A-18
SIP Failure (cont.) SIP temporarily not
available
The participant's
endpoint was contacted
successfully but the
participant is currently
unavailable (e.g., not
logged in or logged in
such a manner as to
preclude
communication with the
participant).
SIP timer popped out OUT (IP only)
The endpoint did not
respond in the given
time frame.
SIP transport error (IP only)
Unable to initiate
connection with the
endpoint.
SIP unauthorized (IP only)
The request requires
user authentication.
SIP unsupported media
type
The server is refusing to
service the request
because the message
body of the request is in
a format not supported
by the requested
resource for the
requested method.
Table A-1: Primary Disconnection Reasons (Continued)
Category Cause Message Description