Pager Other radio bands used for pagers include the 400MHz band, the VHF band, and the FM mercial broadcast band (88-108MHz). Pager service
In this use, they can be thought of as a modern equivalent of maroon rockets. 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). Pager. Alpine pager
Later pagers used digital messages, first numeric and later alphanumeric, to provide the recipient with more rmation. Pager. 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. Common paging protocols include Telocator Alphanumeric input Protocol (TAP), FLEX, ReFLEX, POCSAG, Golay and NTT. Early pagers only provided an audio notification, such as a series of bleeps, to indicate reception of a page. Pagers also have privacy advantages pared with cellular phones. 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 radio bands used for pagers include the 400MHz band, the VHF band, and the FM mercial broadcast band (88-108MHz). Early pagers only provided an audio notification, such as a series of bleeps, to indicate reception of a page. The slower POCSAG on-air protocol is still used for some pagers in the United States and probably in other countries. The paged party then had to telephone the control/call centre to collect the message either from an operator or an early voice mail device. |
