I am trying to register our Lifesize 800 with our Shoretel VOIP system so we can use SIP. However I am having issues with the codec registering with the VOIP system. The Lifesize instructions were followed to configure our Shoretel system. Has anyone else had success in registering a Lifesize codec with a Shoretel system. A support case has already been opened but I was just wondering what other people have seen.