We want to Unified Communicator Express (UCX) on just one phone of those are on the 3300 ICP. Am I correct that the class of service to Enable MiTAI/TAPI Computer Integration could be assigned to just one phone. Mitel Unified Communicator Express- IT and Administrator Guide, pp. 10-. Is there a downside to this? Or, should the Enable MiTAI/TAPI Computer Integration be activiated for all phone and just not activiate PC Connectivity on the other phone and not install UCX on the computers associated with the other phones. Which is easier and less time consuming?