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Wireless pager Pagers using the mercial FM band receive a subcarrier, called the Subsidiary Communications Authority, of a broadcast station. In the United States, pagers typically receive signals using the FLEX protocol in the 900MHz band. Early pagers only provided an audio notification, such as a series of bleeps, to indicate reception of a page. Pagers using the mercial FM band receive a subcarrier, called the Subsidiary Communications Authority, of a broadcast station. Pagers usually have very simple ring tones and some include a vibrating alert. Since a one-way pager is a passive receiver only (it sends no rmation back to the base station), its location cannot be tracked. Common paging protocols include Telocator Alphanumeric input Protocol (TAP), FLEX, ReFLEX, POCSAG, Golay and NTT. Wireless pager. But this can also be a disadvantage, since a message sent to a pager must be broadcast from every paging transmitter in the pager's service area. Other radio bands used for pagers include the 400MHz band, the VHF band, and the FM mercial broadcast band (88-108MHz). Pagers remain in use to notify part-time emergency personnel. Pagers using the mercial FM band receive a subcarrier, called the Subsidiary Communications Authority, of a broadcast station. Wireless pager. 2way pager
Early pagers only provided an audio notification, such as a series of bleeps, to indicate reception of a page. But this can also be a disadvantage, since a message sent to a pager must be broadcast from every paging transmitter in the pager's service area. Pagers remain in use to notify part-time emergency personnel. Past paging protocols include Two-tone and 5/6-tone. |
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