I'm working on a deployment of a UC540W system and had a question about max recommended simultaneous wireless calls on the system. The UC540W will be installed inside a vehicle and connected to a high-gain Omni-directional antenna with a short run of LMR-400. All wireless phone users (using 7921s or 7925s) will have clear line of sight of this antenna. Any idea on the number of simultaneous calls that this equipment will support? Any advantage to running a WLAN controller instead of using the integrated wireless in this unit?