A wireless alarm system (10) employs two-way transceivers (32, 60) in a network of smoke detectors (16), a base station (12), and other sensors. A keypad (14) is not needed because the system is reset by pressing a Test/Silence button (66) built into every detector or sensor. A siren is also eliminated...http://www.google.ca/patents/US6624750?utm_source=gb-gplus-sharePatent US6624750 - Wireless home fire and security alarm system
