Hi Vivek

The only function of TPKT is to define message boundaries.

Annex E has own mechanisms to do this.

So basically I think that should be no TPKT header in the Q.931 messages when used with Annex E.

Sasha

-----Original Message-----
From: Vivek Kakkar [mailto:vkakkar@CISCO.COM]
Sent: Thursday, September 13, 2001 11:19 AM
To: ITU-SG16@MAILBAG.INTEL.COM
Subject: H323 Annex E over UDP and TPKT header

Hello,
I wanted to poll the H323 community regarding the use of TPKT header with H225 message while using AnnexE transport capability. AnnexE makes the UDP a reliable signaling channel. H.323 spec talks of using TPKT header with reliable signaling channel.
What is your interpretation of H323/AnnexE regarding the TPKT header? Does the TPKT header have a function in this case?
thanks,
-- vivek
=============================================================
Vivek Kakkar                      Cisco Systems, Inc.
vkakkar@cisco.com                 Research Triangle Park, NC
919-392-6975:o                    USA