http://blogs.technet.com/b/toninof/archive/2009/10/31/office-communicator-sip-trace-analysis-registration.aspxWhen I changed my career path to Unified Communications a few years ago (after having spent two decades with several UNIX flavors, MS directory and MS messaging platforms), one of the biggest challenges for me was trying to understand what all those methodsen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/toninof/archive/2009/10/31/office-communicator-sip-trace-analysis-registration.aspx#3477499Fri, 27 Jan 2012 07:30:56 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3477499Sachin Raj T N <p>I was searching for this a tutorial which will explain how to analyse OCS logs and what are the normal loging sequence which will help in troubleshooting .This is an excellent post.Have you done any similar document which will demonstrate clearly what excactly happening (or expected to be happen ) while doing a live meeting, Live meeting with audio and video,Calling one to one or many using PSTN/OCS platforms etc etc. .If so please provide me the details to sachinrajtn@hotmail.com or post it here </p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3477499" width="1" height="1">