Security dealer Sonitrol of Indianapolis used to install a lot of photoelectric beams for protecting the perimeter of commercial installations, but today the company relies exclusively on a wireless camera system for perimeter protection. As Sonitrol of Indianapolis Sales Manager, Mike McCalip, explains, the company uses the Videofied camera from St. Paul, Minn.-based RSI Video Technologies, which has its own power source, eliminating the need to trench for wires.