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Minitor pager The slower POCSAG on-air protocol is still used for some pagers in the United States and probably in other countries. Metrocall pager
Pagers remain in use to notify part-time emergency personnel. Other radio bands used for pagers include the 400MHz band, the VHF band, and the FM mercial broadcast band (88-108MHz). Minitor pager. Free pager
Many of today's pagers use the FLEX on-air protocol. For example, they are required to be used by UK lifeboat men and retained firefighters. All text is available under the terms of the GNU Free Documentation License. Pagers usually have very simple ring tones and some include a vibrating alert. 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. Older forms of message submission using the Telocator Alphanumeric input Protocol protocol involve modem connections directly to a paging work, and are less subject to these delays. All text is available under the terms of the GNU Free Documentation License. Past paging protocols include Two-tone and 5/6-tone. Even more recent models included the ability to send messages in a two-way fashion and even included the ability to send and receive email. Since a one-way pager is a passive receiver only (it sends no rmation back to the base station), its location cannot be tracked. Minitor pager. Commercial paging transmitters typically radiate 1000 watts of effective power, resulting in a much wider coverage area per tower than a mobile phone transmitter, which typically radiates in the neighborhood of 0.6 Watt per channel. Other paging protocols used in the VHF, 400MHz UHF, and 900MHz bands include POCSAG and ERMES. |
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