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<DIV><FONT size=2>Hello Paul and Bob!</FONT></DIV>
<DIV><FONT size=2>I prepared the following "speech" for the mailing list,
but it is definitely better to try to understand each other
first...</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>---------------------------------------</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>I hate to disappoint you, but I would strongly disagree with
the proposed "mode" terminology.</FONT></DIV>
<DIV><FONT size=2>I will try to explain below, why it does not fit the URL
concept.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>1. The MAIN purpose of URL is to use the Internet
DNS Infrastructure for SERVICE+ADDRESS resolution ACROSS the
DOMAINS.</FONT><FONT size=2></FONT></DIV>
<DIV><FONT size=2>(</FONT><FONT size=2>The use of the "user-only" URL is [just]
a possible additional feature.)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>2. The H.323 "direct vs. routed" concept specifies the
relations between an End Point and ITS Gatekeeper. It is an
local policy issue WITHIN their zone.</FONT></DIV>
<DIV><FONT size=2>Today, according to H.323 specification, the real flavor
of the operational mode in the DESTINATION zone is UNKNOWN (and
irrelevant) to the originator of the call. </FONT></DIV>
<DIV><FONT size=2>Not mentioning the future possible GK
decomposition!...</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>3. Following the proposed "mode" terminology, I guess,
"routed" would mean "LRQ" or "Access Request" and "direct" would mean "Setup".
In reality, the LRQ would lead to the "direct call" and the Setup would lead to
the "routed call". And how to distinguish between the all three?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>4. The INTER-ZONE communication haven't
been solidly defined so far. (LRQ ? Annex G?)</FONT></DIV>
<DIV><FONT size=2>The INTER-DOMAIN communication is the subject of
H.225.0 Annex G. </FONT></DIV>
<DIV><FONT size=2>The URL approach is an OPTION for all of the "intra" and
"inter" H.323 Zone and H.323 Domain cases.</FONT></DIV>
<DIV><FONT size=2>It may be used as a first lookup, before the LRQ or
Annex G are performed.</FONT></DIV>
<DIV><FONT size=2>It may also have an overlapping functionality with LRQ
and with very specific PARTS of Annex G.</FONT></DIV>
<DIV><FONT size=2>The relations between the H.323 URL and H.225.0 "Annex G"
are very close to those of the SIP-URL and TRIP in a "SIP
system". Both have their uses and complement each other.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>5. The proposal is to have a possibility to "publish", using
the URL, the first procedure, to be issued towards the destination
"domain".</FONT></DIV>
<DIV><FONT size=2>By its nature, it is not an issue for standardization. It is a
policy of the destination domain, which also is responsible for the URL
itself.</FONT></DIV>
<DIV><FONT size=2>The first procedure (i.e. the "method") required for
establishing of a specific call across domains/zones can be either of the
following:</FONT></DIV>
<DIV><FONT size=2>- H.225.0 Annex G/AccessRequest</FONT></DIV>
<DIV><FONT size=2>- H.225.0/LRQ</FONT></DIV>
<DIV><FONT size=2>- H.225.0/CALL SETUP</FONT></DIV>
<DIV><FONT size=2>Once, the first message is issued towards the destination
(which is a result of DNS lookup using the URL), the rest of the
procedures are, indeed, very well defined by H.323 and H.225.0 Annex G all
together</FONT><FONT size=2>. </DIV>
<DIV>
<DIV> </DIV>
<DIV>Best Regards,</DIV></FONT></DIV>
<DIV>Orit Levin<BR>RADVision Inc.<BR>575 Corporate Drive Suite 420<BR>Mahwah, NJ
07430<BR>Tel: 1 201 529 4300 (230)<BR>Fax: 1 201 529 3516<BR><A
href="http://www.radvision.com">www.radvision.com</A><BR><A
href="mailto:orit@radvision.com">orit@radvision.com</A></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">
<DIV><FONT face=Arial size=2><B>-----Original Message-----</B><BR><B>From:
</B>Callaghan, Robert <<A
href="mailto:Robert.Callaghan@ICN.SIEMENS.COM">Robert.Callaghan@ICN.SIEMENS.COM</A>><BR><B>To:
</B><A href="mailto:ITU-SG16@MAILBAG.INTEL.COM">ITU-SG16@MAILBAG.INTEL.COM</A>
<<A
href="mailto:ITU-SG16@MAILBAG.INTEL.COM">ITU-SG16@MAILBAG.INTEL.COM</A>><BR><B>Date:
</B>Thursday, September 07, 2000 8:17 AM<BR><B>Subject: </B>Re: Revised H.323
URL document<BR><BR></DIV></FONT>
<DIV class=Section1>
<P class=MsoNormal><SPAN class=EmailStyle15><FONT color=navy face=Arial
size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt">Paul,<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle15><FONT color=navy face=Arial
size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt"><![if !supportEmptyParas]> <![endif]><o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle15><FONT color=navy face=Arial
size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt">I
definitely like “mode” as a replacement for “protocol.”<SPAN
style="mso-spacerun: yes"> </SPAN>It clearly represents the required
procedure without over doing details.<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle15><FONT color=navy face=Arial
size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt"><![if !supportEmptyParas]> <![endif]><o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle15><FONT color=navy face=Arial
size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt">I
think that we got it.<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle15><FONT color=navy face=Arial
size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt"><![if !supportEmptyParas]> <![endif]><o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle15><FONT color=navy face=Arial
size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt">Bob<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle15><FONT color=navy face=Arial
size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt"><![if !supportEmptyParas]> <![endif]><o:p></o:p></SPAN></FONT></SPAN></P>
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12.0pt;font-family:Arial'><span style='mso-element:field-begin'></span><span
style="mso-spacerun: yes"> </span>AUTOTEXTLIST \s "E-mail
Signature" <span style='mso-element:field-separator'></span></span></font></span><![endif]--><FONT
color=navy><SPAN
style="COLOR: navy">------------------------------------------------------------------</SPAN></FONT><FONT
color=navy><SPAN
style="COLOR: navy; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT color=#339966 face="Cló Gaelach (Twomey)"
size=3><SPAN
style="COLOR: #339966; FONT-FAMILY: 'Cló Gaelach \(Twomey\)'; FONT-SIZE: 12pt">Robert
Callaghan<o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT color=navy face="Times New Roman" size=1><SPAN
style="COLOR: navy; FONT-SIZE: 8pt; mso-bidi-font-size: 12.0pt">Siemens
Enterprise Networks</SPAN></FONT><FONT color=navy size=1><SPAN
style="COLOR: navy; FONT-SIZE: 8pt; mso-bidi-font-size: 12.0pt; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT color=navy face="Times New Roman" size=1><SPAN
style="COLOR: navy; FONT-SIZE: 8pt; mso-bidi-font-size: 12.0pt">Tel:
+1.561.923.1756<SPAN
style="mso-tab-count: 1">
</SPAN>Fax: +1.561.923.1403</SPAN></FONT><FONT color=navy size=1><SPAN
style="COLOR: navy; FONT-SIZE: 8pt; mso-bidi-font-size: 12.0pt; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT color=navy face="Times New Roman" size=1><SPAN
style="COLOR: navy; FONT-SIZE: 8pt; mso-bidi-font-size: 12.0pt">Email:<SPAN
style="mso-tab-count: 1">
</SPAN>Robert.Callaghan@ICN.Siemens.com</SPAN></FONT><FONT color=navy
size=1><SPAN
style="COLOR: navy; FONT-SIZE: 8pt; mso-bidi-font-size: 12.0pt; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT color=navy face="Times New Roman" size=3><SPAN
style="COLOR: navy; FONT-SIZE: 12pt">------------------------------------------------------------------</SPAN></FONT><FONT
color=navy><SPAN
style="COLOR: navy; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
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<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT color=black face=Tahoma
size=2><SPAN
style="COLOR: black; FONT-FAMILY: Tahoma; FONT-SIZE: 10pt">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Paul E.
Jones [mailto:paulej@acm.org]<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Wednesday, September 06, 2000 11:20
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Robert Callaghan; Orit
Levin; ITU-SG16@mailbag.cps.intel.com<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> Revised H.323 URL
document</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"><![if !supportEmptyParas]> <![endif]><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT color=black face=Arial
size=3><SPAN lang=FR
style="COLOR: black; FONT-FAMILY: Arial; FONT-SIZE: 12pt; mso-ansi-language: FR">Orit,
Bob, et al,</SPAN></FONT><FONT color=black><SPAN lang=FR
style="COLOR: black; mso-color-alt: windowtext; mso-ansi-language: FR"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT color=black
face="Times New Roman" size=3><SPAN lang=FR
style="COLOR: black; FONT-SIZE: 12pt; mso-ansi-language: FR"> </SPAN></FONT><FONT
color=black><SPAN lang=FR
style="COLOR: black; mso-color-alt: windowtext; mso-ansi-language: FR"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT color=black face=Arial
size=3><SPAN
style="COLOR: black; FONT-FAMILY: Arial; FONT-SIZE: 12pt">Attached is the
revised section covering the syntax of the H.323 URL. This (I hope)
includes all of the changes we have discussed so far. I am not sure that
we settled on the "mode" parameter, but I made the change here in this
document-- feedback is welcome.</SPAN></FONT><FONT color=black><SPAN
style="COLOR: black; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT color=black
face="Times New Roman" size=3><SPAN
style="COLOR: black; FONT-SIZE: 12pt"> </SPAN></FONT><FONT
color=black><SPAN
style="COLOR: black; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT color=black face=Arial
size=3><SPAN style="COLOR: black; FONT-FAMILY: Arial; FONT-SIZE: 12pt">Best
Regards,</SPAN></FONT><FONT color=black><SPAN
style="COLOR: black; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT color=black face=Arial
size=3><SPAN
style="COLOR: black; FONT-FAMILY: Arial; FONT-SIZE: 12pt">Paul</SPAN></FONT><FONT
color=black><SPAN
style="COLOR: black; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>