I have a client that will be installing next week on Server edition 10.1.2. Most of the phones are communicator and they only have a hand full of physical phones. They just came and said they need to be able to dial out and show different outbound caller ID's from the same phone. (they are running 3 companies out of the system). My problem is they will be on SIP trunks. How will a single user using OneX Communicator be able to dial out and show 3 different caller ID numbers whenever they need to?