Free pager service Pagers also have privacy advantages pared with cellular phones. Pager technology is now used in irrigation control systems and for traffic signals. Some early models included an analog audio receiver and speaker; upon receiving a page the speaker would activate, and the user would hear a human voice reciting their message. All text is available under the terms of the GNU Free Documentation License. Later pagers used digital messages, first numeric and later alphanumeric, to provide the recipient with more rmation. Since a one-way pager is a passive receiver only (it sends no rmation back to the base station), its location cannot be tracked. Pagers remain in use to notify part-time emergency personnel. Early pagers only provided an audio notification, such as a series of bleeps, to indicate reception of a page. Free pager service. This can result in pager messages being delayed or lost. Common paging protocols include Telocator Alphanumeric input Protocol (TAP), FLEX, ReFLEX, POCSAG, Golay and NTT. Many of today's pagers use the FLEX on-air protocol. 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. Although 900MHz FLEX paging works tend to have stronger in-building coverage than mobile phone works, mercial paging service providers will work with large institutions to install repeater equipment in the event that service is not available in needed areas of the subscribing institution's buildings. This is convenient for many users, due to the widespread adoption of email; but email-based message submission methods do not usually provide any way to ensure that messages have been received by the paging work. Free pager service. Pager alert
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