Nursery 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. 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. 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. It pre-dates mobile phone technology, being most popular during the 1980s and 1990s, but similarly uses radio transmissions to municate between a control/call center and the recipient. 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. Pagers also have privacy advantages pared with cellular phones. Pagers remain in use to notify part-time emergency personnel. 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. Pagers remain in use to notify part-time emergency personnel. Many paging operators also support WCTP for sending and receiving messages from 1.5, 1.7 and two-way pagers. All text is available under the terms of the GNU Free Documentation License. Nursery pager. In the United States, pagers typically receive signals using the FLEX protocol in the 900MHz band. Past paging protocols include Two-tone and 5/6-tone. The slower POCSAG on-air protocol is still used for some pagers in the United States and probably in other countries. Many of today's pagers use the FLEX on-air protocol. Nursery pager. |
