H.450 support

Alex Chatilov achatilov at email.msn.com
Thu Sep 16 01:56:33 EDT 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



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