Hospital call system has a wireless pager system and wired intercom pager system two kinds, at present the more widely used for the wireless pager system, not tight low cost, simple installation, and maintenance is also convenient, the distance is more far away. Composition: wireless pager + display receiver host + signal booster (unlimited expansion of the call distance) + wristwatch mobile receiver information machine (within the scope of work to facilitate the reception of the patient's pager information anytime, anywhere). Wired pager system general wiring length can not be greater than 1,000 meters, otherwise it will affect the call quality, through the wall to beat the ear wiring construction of these cumbersome locks are necessary, maintenance can not be point to point. The advantage is that you can talk to each other and talk to each other. Composition: host + extension + corridor double-sided display + ward door lights + bathroom waterproof emergency button + wristwatch mobile receiving information machine (this function is wired to wireless reception, convenient for nurses to work within the scope of the patient's pager at any time and any place to receive information).