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<DIV><FONT face=Arial>Sasha,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>The problem with that is that the Facility message
contains a call Identifier. The only place this is currently used is in
setting the <STRONG>multipleCalls</STRONG> flag. I don't think that's an
issue, even with security compromised. We have to have something that
makes the text in H.323v4 work-- right now there's no way to send a Facility
message to change the <STRONG>multipleCalls </STRONG>flag.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>As an alternative, we could specify that the
CallIdentifier will contain 16 zeros when sending non-call-related messages, as
opposed to using the <STRONG>empty</STRONG> choice.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>What's the group's preference?</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Paul</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=sasha@tlv.radvision.com href="mailto:sasha@tlv.radvision.com">Sasha
Ruditsky</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=paulej@PACKETIZER.COM
href="mailto:paulej@PACKETIZER.COM">Paul E. Jones</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A
title=ITU-SG16@mailbag.cps.intel.com
href="mailto:ITU-SG16@mailbag.cps.intel.com">ITU-SG16@mailbag.cps.intel.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, December 10, 2000 8:23
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Corrections to H.225.0v4 and
H.323v4</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=476355312-10122000>Hi
Paul</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=476355312-10122000></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=476355312-10122000>Everything looks OK with me except the very 1st
change.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=476355312-10122000>Specifically the empty <B>h323-message-body</B>
element for non call related Q.931 messages.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=476355312-10122000>The
empty <STRONG>h323-message-body</STRONG> does not allow to add tokens to
the FACILITY message so it cannot be authenticated and its integrity cannot be
checked.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=476355312-10122000>My proposal is to change wording here to allow
non empty <STRONG>h323-message-body</STRONG> in the case security is
required</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=476355312-10122000></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=476355312-10122000></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=476355312-10122000>Sasha </SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=476355312-10122000></SPAN></FONT> </DIV>
<DIV><SPAN class=476355312-10122000></SPAN><FONT face=Tahoma><FONT
size=2><SPAN class=476355312-10122000><FONT face=Arial
color=#0000ff></FONT></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=Tahoma><FONT size=2><SPAN
class=476355312-10122000></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=Tahoma><FONT size=2><SPAN
class=476355312-10122000></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=Tahoma><FONT size=2><SPAN
class=476355312-10122000> </SPAN>-----Original
Message-----<BR><B>From:</B> Paul E. Jones
[mailto:paulej@PACKETIZER.COM]<BR><B>Sent:</B> Saturday, December 09, 2000
12:06 AM<BR><B>To:</B> ITU-SG16@mailbag.cps.intel.com<BR><B>Subject:</B>
Corrections to H.225.0v4 and H.323v4<BR><B>Importance:</B>
High<BR><BR></DIV></FONT></FONT>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial>H.323 Experts,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I have attached a document that contains the complete
list of corrections for H.225.0v4 and H.323v4, with differences against the
decided text, that we have discussed on the mailing list this past
week.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I would like all interested parties to review these
changes.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I am open to changing the wording, but I would like to
get consensus on making these changes. I have asked the TSB to see if
we can make these corrections prior to the publication of the
documents. If so, I want to have the support of everyone to make these
corrections. I don't believe that any of these issues should be
contentious, but without these corrections, I'm afraid that many more
questions and interoperability problems will arise.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>If it turns out that we cannot update the approved
text before publication, I plan to submit this document (or a modified
version with comments I receive from you) to the next meeting in
March. Personally, I'd rather correct the Recommendation before
publication, rather than adding this to the Implementers Guide.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Thanks,</FONT></DIV>
<DIV><FONT face=Arial>Paul</FONT></DIV>
<DIV><FONT
face=Arial></FONT> </DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>