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Ip pager sistemi The slower POCSAG on-air protocol is still used for some pagers in the United States and probably in other countries. Later pagers used digital messages, first numeric and later alphanumeric, to provide the recipient with more rmation. In this use, they can be thought of as a modern equivalent of maroon rockets. On a smaller scale, pagers are sometimes carried by staff in medical establishments, allowing them to be summoned to emergencies. Pagers using the mercial FM band receive a subcarrier, called the Subsidiary Communications Authority, of a broadcast station. All text is available under the terms of the GNU Free Documentation License. This is especially critical in hospital settings where emergency staff must be able to reliably receive pages in order to respond to patient needs. Other paging protocols used in the VHF, 400MHz UHF, and 900MHz bands include POCSAG and ERMES. Other radio bands used for pagers include the 400MHz band, the VHF band, and the FM mercial broadcast band (88-108MHz). In the United States, pagers typically receive signals using the FLEX protocol in the 900MHz band. Ip pager sistemi. Many paging operators also support WCTP for sending and receiving messages from 1.5, 1.7 and two-way pagers. In the United States, pagers typically receive signals using the FLEX protocol in the 900MHz band. 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). For this reason, older forms of message submission retain their usefulness for disseminating highly-important alerts to users such as emergency services personnel. Other paging protocols used in the VHF, 400MHz UHF, and 900MHz bands include POCSAG and ERMES. |
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