Hi Ray,
I'm guessing you left out the part that says you are using Asterisk 1.6 with X-Lite connect to it?
So it looks like this?
MOC -> OCS server -> OCS Mediation -> Asterisk -> XLite
Correct?
Try Geoff's blog - it's a good starting point.
http://blogs.technet.com/gclark/archive/2008/10/09/asterisk-1-6-with-office-communications-server-2007.aspxThere can be a few 'things' to watch out for, such as DNS & NAT settings - plus the gateway normalisation rules from OCS.
Come back with specific questions if you cannot get this to work. Please try to include some errors & details.
I have this setup in a live environment - works great & has been extremly stable.
Regards
Paul