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<TITLE>RE: On TD26 - Fast TCS and M/S negotiation in H.323v4</TITLE>
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<P><FONT SIZE=2>Another contribution talked about the gatekeeper using FACILITY whenever a CALL PROCEEDING was received but not available because</FONT></P>
<P><FONT SIZE=2>already sent. We also added some missing fields present in</FONT>
<BR><FONT SIZE=2>CALL PROCEEDING but not in FACILITY to FACILITY. We could add a </FONT>
<BR><FONT SIZE=2>reference.</FONT>
</P>
<P><FONT SIZE=2>-----Original Message-----</FONT>
<BR><FONT SIZE=2>From: Pete Cordell [<A HREF="mailto:pete@TECH-KNOW-WARE.COM">mailto:pete@TECH-KNOW-WARE.COM</A>]</FONT>
<BR><FONT SIZE=2>Sent: Saturday, May 20, 2000 10:57</FONT>
<BR><FONT SIZE=2>To: ITU-SG16@MAILBAG.INTEL.COM</FONT>
<BR><FONT SIZE=2>Subject: On TD26 - Fast TCS and M/S negotiation in H.323v4</FONT>
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<P><FONT SIZE=2>I note that TD-26 has been accepted to show how TCS can be conveyed in</FONT>
<BR><FONT SIZE=2>parallel with fast start.</FONT>
</P>
<P><FONT SIZE=2>However, the example shows the use of call proceeding for receiving TCS back</FONT>
<BR><FONT SIZE=2>from the remote endpoint. This is not typically an end-to-end message, and</FONT>
<BR><FONT SIZE=2>therefore how the procedure works with the gatekeeper routed model needs to</FONT>
<BR><FONT SIZE=2>be addressed.</FONT>
</P>
<P><FONT SIZE=2>Possible solutions are:</FONT>
</P>
<P><FONT SIZE=2>1. Refer to the new text that says it is the responsibility of the</FONT>
<BR><FONT SIZE=2>gatekeeper to forward any tunnelled message for which none is available</FONT>
<BR><FONT SIZE=2>using FACILITY. (There might be some objection from some to using a</FONT>
<BR><FONT SIZE=2>facility message this early in the call setup process though.)</FONT>
</P>
<P><FONT SIZE=2>2. Restrict the tunnelling (and probably the fast start info) to Alerting,</FONT>
<BR><FONT SIZE=2>Connect and Facility, which generally are end-to-end. I believe this is</FONT>
<BR><FONT SIZE=2>compatible with the latest procedures for deciding when fast start has been</FONT>
<BR><FONT SIZE=2>ignored.</FONT>
</P>
<P><FONT SIZE=2>Which ever option is chosen, it would also be nice to have a picture for it</FONT>
<BR><FONT SIZE=2>also!</FONT>
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<P><FONT SIZE=2>Pete</FONT>
</P>
<P><FONT SIZE=2>=============================================</FONT>
<BR><FONT SIZE=2>Pete Cordell</FONT>
<BR><FONT SIZE=2>pete@tech-know-ware.com</FONT>
<BR><FONT SIZE=2>=============================================</FONT>
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<P><FONT SIZE=2>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</FONT>
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