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Hospital communication systems designed to page, summon, or locate people and to provide voice (i.e., telephonic) communication between staff members and/or between staff and individual patients through radiated electromagnetic (i.e., wireless) signals. These systems typically consist of a central transmission unit including a switching device that allows communication with each user, power supplies, electromagnetic (e.g., radiofrequency, microwave) signal transmission, and appropriate antennas and reception devices such as telephone sets (e.g., handsets, badge-like devices) with paging capabilities. Hospital paging/wireless telephone communication systems may include visual displays to show the received messages and audible, tactile, or visual signals to attract the user\'s attention when a message is received; they provide routine and emergency voice communication and paging capabilities.
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