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<DIV><FONT face=Arial color=#008080 size=2>Hi, Paul,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>To get some information of one Q.931 message,
say the "sourceInfo" of the "SETUP" message, what's the path starting from
"TCP data" should we follow?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The path: "TCP data --> H323-UserInformation
--> h323-uu-pdu --> h323-message-body --> setup --> sourceInfo "
certainly is not right, as Q931 messages all have three outer mandatory
fields: "Protocol discriminator", "CallReference" and
"MessageType". The "H323-UserInformatin" is only part of "User-User"
field, which in turn is in the same rank with "Protocol discriminator",
"CallReference" and "MessageType" fields. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>There should be a divergence point where all the
Q.931 messages received from TCP are processed. </FONT></DIV>
<DIV><FONT face=Arial size=2>Could you please consider this and tell me
the right path?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2>-Delphi</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #008080 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 9pt 宋体">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 9pt 宋体; font-color: black"><B>From:</B>
<A title=plong@IPDIALOG.COM href="mailto:plong@IPDIALOG.COM">Paul Long</A>
</DIV>
<DIV style="FONT: 9pt 宋体"><B>To:</B> <A title=ITU-SG16@MAILBAG.INTEL.COM
href="mailto:ITU-SG16@MAILBAG.INTEL.COM">ITU-SG16@MAILBAG.INTEL.COM</A> </DIV>
<DIV style="FONT: 9pt 宋体"><B>Sent:</B> Tuesday, May 08, 2001 11:43 PM</DIV>
<DIV style="FONT: 9pt 宋体"><B>Subject:</B> Re: How to get the heel of RAS
Message.</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=850453315-08052001><FONT face=Arial color=#0000ff
size=2>Delphi,</FONT></SPAN></DIV>
<DIV><SPAN class=850453315-08052001><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=850453315-08052001><FONT face=Arial color=#0000ff size=2>1. I
have no idea what the user-data component is used for.</FONT></SPAN></DIV>
<DIV><SPAN class=850453315-08052001><FONT face=Arial color=#0000ff size=2>2. I
don't know what you mean by "get and set," but RAS does not use Q.931 or UUIEs
in its encoding. It uses ASN.1 PER exclusively. I assume by your
other question that you are asking what the outer-most encoding is
for RAS. With call-signaling, it's Q.931; with RAS, it's ASN.1 PER--RAS uses
ASN.1 PER throughout.</FONT></SPAN></DIV>
<DIV><SPAN class=850453315-08052001><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=850453315-08052001><FONT face=Arial color=#0000ff size=2>Paul
Long</FONT></SPAN></DIV>
<DIV><SPAN class=850453315-08052001><FONT face=Arial color=#0000ff
size=2>ipDialog, Inc.</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Mailing list for parties
associated with ITU-T Study Group 16
[mailto:ITU-SG16@mailbag.cps.INTEL.COM]<B>On Behalf Of
</B>Delphi<BR><B>Sent:</B> Tuesday, May 08, 2001 1:53 AM<BR><B>To:</B>
ITU-SG16@mailbag.cps.INTEL.COM<BR><B>Subject:</B> How to get the heel of RAS
Message.<BR><BR></FONT></DIV>
<DIV><FONT face=Arial color=#008080 size=2>Hi, all:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have two problems concerning H.323
ASN.1.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>1> </FONT></DIV>
<DIV><FONT face=Arial size=2>H.323 ASN.1 states as follows:</FONT></DIV>
<DIV><FONT face=Arial
size=2>>>>>>>>>></FONT></DIV>
<DIV><FONT face=Arial size=2>H323-UserInformation::=SEQUENCE</FONT></DIV>
<DIV><FONT face=Arial size=2>{</FONT></DIV>
<DIV><FONT face=Arial color=#008080 size=2>
h323-uu-pdu H323-UU-PDU,</FONT></DIV>
<DIV><FONT face=Arial color=#008080 size=2>
user-data SEQUENCE</FONT></DIV>
<DIV><FONT face=Arial size=2> {</FONT></DIV>
<DIV><FONT face=Arial size=2>
protocol-discriminator INTEGER
(0..255),</FONT></DIV>
<DIV><FONT face=Arial
size=2> user-information
OCTET STRING (SIZE(1..131)),</FONT></DIV>
<DIV><FONT face=Arial size=2>
.....</FONT></DIV>
<DIV><FONT face=Arial size=2> }OPTIONAL,</FONT></DIV>
<DIV><FONT face=Arial size=2> ....</FONT></DIV>
<DIV><FONT face=Arial size=2>}</FONT></DIV>
<DIV><FONT face=Arial
size=2><<<<<<<<<<</FONT></DIV>
<DIV><FONT face=Arial size=2>My question is," What's the use of "user-date"
field and what its protocol-discriminator field stand for? " Can anyone
present me an example?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>2></FONT></DIV>
<DIV><FONT face=Arial size=2>The H.323 ASN.1 tells us that following the
path "H323-UserInformation>>h323-uu-pdu>>h323-message-body", we
can get and set UUIE of Q931 messages. But how can we do the same thing with
RAS messages? </FONT></DIV>
<DIV><FONT face=Arial size=2>Or, what are the "ABSOLUTE PATH", the
root, of the messages? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial
size=2>-Delphi</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>