Annex E Question.

Paul E. Jones paulej at PACKETIZER.COM
Mon Jul 3 02:41:40 EDT 2000


Sasha,

As you stated, the flag bit in the session field of Annex E/H.323 messages
shall be set to the same value as the CRV in the Q.931 message found in the
payload.

Would you like to propose clarifying text?  I'll put it into the IG for
review in Portland.

Paul

----- Original Message -----
From: "Sasha Ruditsky" <sasha at TLV.RADVISION.COM>
To: <ITU-SG16 at mailbag.cps.intel.com>
Sent: Sunday, July 02, 2000 12:01 PM
Subject: Annex E Question.


> > Hi
> >
> > I believe that the following paragraph from the H.323 Annex E may be
> > understood differently by different people:
> > -------
> > E.2.3.5       Session field
> > The session field shall be present in all payloads. The Session value
> > shall contain the CRV from the Q.931 messages. Specifically, the call
> > reference flag shall be included as the most significant bit of the
> > CallReferenceValue. This restricts the actual CRV to the range of 0
> > through 32767, inclusive.
> > -------
> >
> > I think this means that the Annex E session field is different (in the
> > Flag bit) for Setup and Connect messages of the same call. (Exactly like
> > CRV is).
> > I agree that the alternation of the 16th bit of the Annex E session
field
> > in the messages of the same session (call) moving in different
directions
> > is required,
> > but I do not think that the described behavior is obvious from the
field's
> > name and its description.
> >
> > If there is agreement on the fact that the messages belonging to the
same
> > call but moving in opposite directions shall have different values of
the
> > 16th bit  of the Annex E session field, that probably we need to state
> > this explicitly in the E.2.3.5. I agree that this is ALMOST what is
> > written their, but we all know how ambiguous may be the CRV-like field
> > description.
> >
> >
> > Sasha
> >
> > ***********************************************
> > Alexander(Sasha) Ruditsky
> > RADVision Ltd.
> > 24 Raul Wallenberg St.
> > Tel Aviv 69719  Israel
> >
> > Tel:       +972-3-645-5220
> > Fax:       +972-3-645-6464
> > Direct:    +972-3-645-5273
> > sasha at radvision.rad.co.il
> > ***********************************************
> >
> >
>
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