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A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.
In 1986 the company purchased MCI's wireless operations, cellular and paging, for $122 million, and changed their name to "McCaw Cellular Communications". [2] In 1989 the company outbid BellSouth for control of LIN Broadcasting , which owned licenses in Houston , Dallas , Los Angeles , and New York , paying $3.5 billion, a price that ...
A pager, also known as a beeper or bleeper, [1] is a wireless telecommunications device that receives and displays alphanumeric or voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to, and originate messages using an internal transmitter.
Radio-paging code No. 1 (usually and hereafter called POCSAG) is an asynchronous protocol used to transmit data to pagers. Its usual designation is an acronym of the P ost O ffice C ode S tandardisation A dvisory G roup, the name of the group that developed the code under the chairmanship of the British Post Office that used to operate most ...
The system was designed at the beginning of the 1980s prior to the Bell System breakup as a modern electronic replacement for the dated electromechanical 1A2 Key System. Earlier Bell attempts at an electronic key system, such as Horizon and Dimension, were not as successful as were the much larger systems; in fact, Dimension was a PBX. The ...
US West's US West New Vector was also created from AMPS. In July 1994, U S West agreed to a joint venture with AirTouch as a prelude to merging the cellular unit into AirTouch. [4] By 1996, all accounts were operated under the AirTouch name. Due to regulatory issues, [5] the full merger was not completed until February 1998. [6]
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In The Netherlands the emergency services use the Flex-protocol in the nationwide P2000 network for pagers. The traffic on this network can be monitored online. [1]In South Australia the State's SAGRN network for the Emergency Services paging system (CFS, SES, MFS and SAAS) is run on the FLEX 1600 protocol, and can be monitored online.