In my current enviroment I use TMS for managment and register all my video enpoint to VCS or VCSe. We have a SIP Truck from out VCS to UCM to dial into confernces in our MCU(codian 4520) via phone. With this setup what would the pro's and con's of regiersting endpoint to the UCM instead of VCS? Keeping my enpoint registered to VCS, what could I gain from adding the UCM to TMS?