In addition to the University of Pennsylvania Police Department, DPS also retains a vast network of security technology and guard services. Allied Barton security officers provide walking and bike patrols, escorts and also maintain a security presence for all residential buildings. For your piece of mind, Penn is equipped with four-hundred and fifty emergency blue light phones, 99 pan-tilt-zoom closed-circuit television cameras, electronic access control card readers, burglar and door alarms, sensors, and duress alarms installed in restrooms throughout campus.