Pepper pager This can result in pager messages being delayed or lost. The slower POCSAG on-air protocol is still used for some pagers in the United States and probably in other countries. Pager technology is now used in irrigation control systems and for traffic signals. Note that the idiomatic sound heard in popular media (movies and television programs) as "pager going off" (a series of two short beeps interrupted by a slightly longer pause) is actually the "pager power-up verification beep" sequence, perhaps because it was easier to generate that tone on demand (simply flip the power switch on). Common paging protocols include Telocator Alphanumeric input Protocol (TAP), FLEX, ReFLEX, POCSAG, Golay and NTT. 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). 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. 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. Later pagers used digital messages, first numeric and later alphanumeric, to provide the recipient with more rmation. Pepper pager. Pager technology is now used in irrigation control systems and for traffic signals. In this use, they can be thought of as a modern equivalent of maroon rockets. Pepper pager. Pepper pager
Thus, if a pager has nationwide service, a message sent to it could be intercepted by criminals or law enforcement agencies anywhere within the nationwide service area. 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. 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. |
