About "FACILITY message"

[B $B=_B <kadota@REL.TRL.MEI.CO.JP>]

Might I ask a question ?
I read "8.2.1  Encapsulation of H.245 Messages within Q.931 Messages"
in ITU-T RECOMMENDATION H.323.

The document says,

"When tunneling is active, one or more H.245 messages can be encapsulated in
any Q.931 message. If tunneling is being utilized and there is no need for
transmission of a Q.931 message at the time an H.245 message must be
transmitted, then a FACILITY message shall be sent with h323-message-body
set to empty."

The encapsulation of H.245 messages is done in the Fast Connect Procedure.
Most of the H.245 channel establishment is accomplished in the Fast Connect
procedure. But there may be H.245 messages that may occur after call
establishment that may be sent using the Facility message.

I want to know exactly what are such H.245 messages.
Would you tell me those or where in documents to be searched ?

And, How is the typical sequence of the Fast Connect Procedure
including FACILITY messages ?

Best Regards
Atsushi Kadota
mailto: kadota at rel.trl.mei.co.jp

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For help on this mail list, send "HELP ITU-SG16" in a message to
listserv at mailbag.intel.com