<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
<META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2448.0">
<TITLE>RE: H246annexC Progress Indicators</TITLE>
</HEAD>
<BODY>
<P><FONT SIZE=2>Why would we need two Progress indicators?</FONT>
</P>
<P><FONT SIZE=2>> -----Original Message-----</FONT>
<BR><FONT SIZE=2>> From: Christian Groves [<A HREF="mailto:Christian.Groves@ERICSSON.COM">mailto:Christian.Groves@ERICSSON.COM</A>]</FONT>
<BR><FONT SIZE=2>> Sent: Thursday, October 28, 1999 2:33 PM</FONT>
<BR><FONT SIZE=2>> To: ITU-SG16@MAILBAG.INTEL.COM</FONT>
<BR><FONT SIZE=2>> Subject: H246annexC Progress Indicators</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> G'Day,</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> In my H246 annex C draft recommendation section C.6.1.4.2 </FONT>
<BR><FONT SIZE=2>> I've said that</FONT>
<BR><FONT SIZE=2>> an Alerting and Progress can contain two progress indicator </FONT>
<BR><FONT SIZE=2>> elements. I</FONT>
<BR><FONT SIZE=2>> can't find anything in H.225 or H.323 that forbids this.</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> ie.</FONT>
<BR><FONT SIZE=2>> Progress indicator</FONT>
<BR><FONT SIZE=2>> Progress indicator information elements possibly present in the access</FONT>
<BR><FONT SIZE=2>> transport parameter of the Call Progress Message (CPG) are transferred</FONT>
<BR><FONT SIZE=2>> into the message sent to the calling user. If the calling user is a</FONT>
<BR><FONT SIZE=2>> H.323 end system it need not interpret this information element.</FONT>
<BR><FONT SIZE=2>> In addition, progress indicator information elements are </FONT>
<BR><FONT SIZE=2>> created by the</FONT>
<BR><FONT SIZE=2>> Interworking function according to the coding of the Call Progress</FONT>
<BR><FONT SIZE=2>> Message (CPG). Table 15 shows the sending criteria of each value.</FONT>
<BR><FONT SIZE=2>> Every message sent to the access (ALERTING or PROGRESS) may </FONT>
<BR><FONT SIZE=2>> contain two</FONT>
<BR><FONT SIZE=2>> progress indicator information elements. When more than two progress</FONT>
<BR><FONT SIZE=2>> indicator information elements are to be sent, the supplementary</FONT>
<BR><FONT SIZE=2>> progress indicator information elements are sent in a </FONT>
<BR><FONT SIZE=2>> PROGRESS message.</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> Are people happy to leave this in or do you only want to see one</FONT>
<BR><FONT SIZE=2>> supported??</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> Cheers, Christian</FONT>
<BR><FONT SIZE=2>> </FONT>
</P>
</BODY>
</HTML>