Two way pager On a smaller scale, pagers are sometimes carried by staff in medical establishments, allowing them to be summoned to emergencies. 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. Two way pager. For example, they are required to be used by UK lifeboat men and retained firefighters. Two way pager. Alpine pager
Pagers remain in use to notify part-time emergency personnel. 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. This is especially critical in hospital settings where emergency staff must be able to reliably receive pages in order to respond to patient needs. 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. Early pagers only provided an audio notification, such as a series of bleeps, to indicate reception of a page. Common paging protocols include Telocator Alphanumeric input Protocol (TAP), FLEX, ReFLEX, POCSAG, Golay and NTT. Even more recent models included the ability to send messages in a two-way fashion and even included the ability to send and receive email. Many paging operators also support WCTP for sending and receiving messages from 1.5, 1.7 and two-way pagers. Many paging work operators now allow numeric and textual pages to be submitted to the paging works via email. All text is available under the terms of the GNU Free Documentation License. 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. 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). |
