Radio pager Early pagers only provided an audio notification, such as a series of bleeps, to indicate reception of a page. Motorola 2way pager
All text is available under the terms of the GNU Free Documentation License. Other radio bands used for pagers include the 400MHz band, the VHF band, and the FM mercial broadcast band (88-108MHz). 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. In this use, they can be thought of as a modern equivalent of maroon rockets. This is especially critical in hospital settings where emergency staff must be able to reliably receive pages in order to respond to patient needs. All text is available under the terms of the GNU Free Documentation License. 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. 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. This is especially critical in hospital settings where emergency staff must be able to reliably receive pages in order to respond to patient needs. Pager technology is now used in irrigation control systems and for traffic signals. In the United States, pagers typically receive signals using the FLEX protocol in the 900MHz band. This is especially critical in hospital settings where emergency staff must be able to reliably receive pages in order to respond to patient needs. Past paging protocols include Two-tone and 5/6-tone. Radio pager. Pager motor
In the United States, pagers typically receive signals using the FLEX protocol in the 900MHz band. Radio pager. |
