SIP Trunking and media bypass

SIP trunking has become a common term in the Microsoft worlds of OCS R2 and Lync Server 2010. Many Microsoft administrators had never heard of SIP so the learning curve has been pretty steep.

I found a reference to this animation which includes Media bypass as well, apologies but cant remember where, so thought I would include it.

Its on the techtionary website and belongs to them and the author.

Here it is
http://www.techtionary.com/lyncforum/lync-bypass/