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<TITLE>RE: Conflicting text in H.323 concerning the requirement for esta blishing a H.245 control channel??</TITLE>
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<P><FONT SIZE=2>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.</FONT></P>
<P><FONT SIZE=2>> -----Original Message-----</FONT>
<BR><FONT SIZE=2>> From: Agboh, Charles [<A HREF="mailto:charles.agboh@EBONE.COM">mailto:charles.agboh@EBONE.COM</A>]</FONT>
<BR><FONT SIZE=2>> Sent: Tuesday, March 20, 2001 7:49 AM</FONT>
<BR><FONT SIZE=2>> To: ITU-SG16@MAILBAG.INTEL.COM</FONT>
<BR><FONT SIZE=2>> Subject: Re: Conflicting text in H.323 concerning the requirement for</FONT>
<BR><FONT SIZE=2>> esta blishing a H.245 control channel??</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> which defeats the whole point of having a Fast Connect procedure (FS +</FONT>
<BR><FONT SIZE=2>> H.245). Why isn't in-band- DTMF transfer used instead (in FS)?</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> -Charles</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> > -----Original Message-----</FONT>
<BR><FONT SIZE=2>> > From: Frank Derks [<A HREF="mailto:frank.derks@PHILIPS.COM">mailto:frank.derks@PHILIPS.COM</A>]</FONT>
<BR><FONT SIZE=2>> > Sent: Tuesday, March 20, 2001 4:40 PM</FONT>
<BR><FONT SIZE=2>> > To: ITU-SG16@MAILBAG.INTEL.COM</FONT>
<BR><FONT SIZE=2>> > Subject: Re: Conflicting text in H.323 concerning the </FONT>
<BR><FONT SIZE=2>> requirement for</FONT>
<BR><FONT SIZE=2>> > establishing a H.245 control channel??</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > Chris,</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > I thought I was being clear enough, so let me try again.</FONT>
<BR><FONT SIZE=2>> > 6.2.8/H.323 states</FONT>
<BR><FONT SIZE=2>> > that an enpoint must open one (and exactly one) H.245 control</FONT>
<BR><FONT SIZE=2>> > channel. When</FONT>
<BR><FONT SIZE=2>> > Fast Connect is being used, I assume that the intention is</FONT>
<BR><FONT SIZE=2>> > that no such control</FONT>
<BR><FONT SIZE=2>> > channel is opened.</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > To be compliant with 6.2.8/H,323 I would have to open a H.245</FONT>
<BR><FONT SIZE=2>> > control channel</FONT>
<BR><FONT SIZE=2>> > irrespective of which type of H.245 procedures I will be</FONT>
<BR><FONT SIZE=2>> > using. So if I intend</FONT>
<BR><FONT SIZE=2>> > to use Fast Start (and assuming that the other party also</FONT>
<BR><FONT SIZE=2>> > supports this), I</FONT>
<BR><FONT SIZE=2>> > still have to open a H.245 control channel.</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > Frank</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > cwp@isdn-comms.co.uk on 20-03-2001 15:17:14</FONT>
<BR><FONT SIZE=2>> > To: Frank Derks/HVS/BE/PHILIPS@EMEA2</FONT>
<BR><FONT SIZE=2>> > cc: ITU-SG16@mailbag.cps.INTEL.COM@SMTP</FONT>
<BR><FONT SIZE=2>> > Subject: Re: Conflicting text in H.323 concerning the</FONT>
<BR><FONT SIZE=2>> > requirement for establishing a H.245 control channel??</FONT>
<BR><FONT SIZE=2>> > Classification:</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > Frank,</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > Why do you consider this text to be "conflicting"?</FONT>
<BR><FONT SIZE=2>> > Specifically, with what does it conflict?</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > Regards,</FONT>
<BR><FONT SIZE=2>> > Chris</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > > 6.2.8/H.323 states: "The endpoint shall establish exactly </FONT>
<BR><FONT SIZE=2>> one H.245</FONT>
<BR><FONT SIZE=2>> > > Control Channel for each call that the endpoint is</FONT>
<BR><FONT SIZE=2>> > participating in."</FONT>
<BR><FONT SIZE=2>> > > 8.1.7/H.323 never states that when Fast Connect is being </FONT>
<BR><FONT SIZE=2>> used such a</FONT>
<BR><FONT SIZE=2>> > > control channel should be established. As far as I understand the</FONT>
<BR><FONT SIZE=2>> > > mechanism this is only required to switch to "normal" H.245</FONT>
<BR><FONT SIZE=2>> > procedures.</FONT>
<BR><FONT SIZE=2>> > ></FONT>
<BR><FONT SIZE=2>> > > It would seem that section 6.2.8 should be rephrased to</FONT>
<BR><FONT SIZE=2>> > make clear that</FONT>
<BR><FONT SIZE=2>> > > the H.245 control channel shall only be established when</FONT>
<BR><FONT SIZE=2>> > "normal" H.245</FONT>
<BR><FONT SIZE=2>> > > procedures are being followed and not in the fast connect case.</FONT>
<BR><FONT SIZE=2>> > ></FONT>
<BR><FONT SIZE=2>> > > Frank</FONT>
<BR><FONT SIZE=2>> > --</FONT>
<BR><FONT SIZE=2>> > Dr Chris Purvis -- Development Manager</FONT>
<BR><FONT SIZE=2>> > ISDN Communications Ltd, The Stable Block, Ronans, Chavey Down Road</FONT>
<BR><FONT SIZE=2>> > Winkfield Row, Berkshire. RG42 6LY ENGLAND</FONT>
<BR><FONT SIZE=2>> > Phone: +44 1344 899 007</FONT>
<BR><FONT SIZE=2>> > Fax: +44 1344 899 001</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > </FONT>
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