H.450 support

16 Sep 1999


      Hello,
I have a question about how to detect does remote endpoint supports H.450
(without using a timer)? Is it clear that receiving endpoint has to replay
with a STATUS message in case when it receive an H.450 related FACILITY
message?
Assume that we have:
Originator side sent:
     --------------------
FACILITY
      FacilityIE
      (length=0)
       ...
      User-UserIE
       H323-UserInformation
        h323-UU-PDU
         h323-message-body = empty
          ...
         h4501SupplementaryService
         (H.450.x request)
          ...
        ...
       ...
Remote side received FACILITY, here is no
support for H.450, so we will respond with
STATUS message where the causeIE  =
       100 (invalid IE contents), or
       99 (Information element/parameter non-existent
       or not implemented), or
       97 (Message type non-existent or not implemented)
STATUS
       ...
       CauseIE
        ...
        cause       = XX
        diagnostics = YY
        ...
Am I right?
Thank you,
Alex

H.450 support

Alex Chatilov