Conflicting text in H.323 concerning the requirement for esta blishing a H.245 control channel??

Francois Audet audet at nortelnetworks.com
Tue Mar 20 14:26:11 EST 2001


Fast start sole purpose is to get you talking as fast as possible. It is not
to get you inputing digits as fast as possible.

> -----Original Message-----
> From: Agboh, Charles [mailto:charles.agboh at EBONE.COM]
> Sent: Tuesday, March 20, 2001 7:49 AM
> To: ITU-SG16 at MAILBAG.INTEL.COM
> Subject: Re: Conflicting text in H.323 concerning the requirement for
> esta blishing a H.245 control channel??
>
>
> which defeats the whole point of having a Fast Connect procedure (FS +
> H.245).  Why isn't in-band- DTMF transfer used instead (in FS)?
>
> -Charles
>
> > -----Original Message-----
> > From: Frank Derks [mailto:frank.derks at PHILIPS.COM]
> > Sent: Tuesday, March 20, 2001 4:40 PM
> > To: ITU-SG16 at MAILBAG.INTEL.COM
> > Subject: Re: Conflicting text in H.323 concerning the
> requirement for
> > establishing a H.245 control channel??
> >
> >
> > Chris,
> >
> > I thought I was being clear enough, so let me try again.
> > 6.2.8/H.323 states
> > that an enpoint must open one (and exactly one) H.245 control
> > channel. When
> > Fast Connect is being used, I assume that the intention is
> > that no such control
> > channel is opened.
> >
> > To be compliant with 6.2.8/H,323 I would have to open a H.245
> > control channel
> > irrespective of which type of H.245 procedures I will be
> > using. So if I intend
> > to use Fast Start (and assuming that the other party also
> > supports this), I
> > still have to open a H.245 control channel.
> >
> > Frank
> >
> >
> >
> >
> >
> >
> > cwp at isdn-comms.co.uk on 20-03-2001 15:17:14
> > To:     Frank Derks/HVS/BE/PHILIPS at EMEA2
> > cc:     ITU-SG16 at mailbag.cps.INTEL.COM@SMTP
> > Subject:        Re: Conflicting text in H.323 concerning the
> > requirement for establishing a H.245 control channel??
> > Classification:
> >
> > Frank,
> >
> > Why do you consider this text to be "conflicting"?
> > Specifically, with what does it conflict?
> >
> > Regards,
> > Chris
> >
> > > 6.2.8/H.323 states: "The endpoint shall establish exactly
> one H.245
> > > Control Channel for each call that the endpoint is
> > participating in."
> > > 8.1.7/H.323 never states that when Fast Connect is being
> used such a
> > > control channel should be established. As far as I understand the
> > > mechanism this is only required to switch to "normal" H.245
> > procedures.
> > >
> > > It would seem that section 6.2.8 should be rephrased to
> > make clear that
> > > the H.245 control channel shall only be established when
> > "normal" H.245
> > > procedures are being followed and not in the fast connect case.
> > >
> > > Frank
> > --
> > Dr Chris Purvis -- Development Manager
> > ISDN Communications Ltd, The Stable Block, Ronans, Chavey Down Road
> > Winkfield Row, Berkshire.  RG42 6LY  ENGLAND
> > Phone: +44 1344 899 007
> > Fax:   +44 1344 899 001
> >
> >
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