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It appears that US-specification paging systems operating on 27.255 MHz have been sold in Italy and other European countries. The former monopoly operator SIP (which later became TIM) used the following frequencies for their pager service, called Teledrin: 161.175 MHz (for tone/voice only and numeric pagers, probably for the alphanumeric pagers);
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.
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A paging system alerts a pager (or group of pagers) by transmitting information over an RF channel, including an address and message information. This information is formatted using a paging protocol, such as 2-tone, 5/6-tone, GOLAY, POCSAG, FLEX, ERMES, or NTT. Two-way pagers and response pagers typically use the ReFLEX protocol. [29]
ERMES never achieved recognition as a leading paging standard. [5] [10] [11] There were questions over costs [4] [12] and also the ERMES standard was in competition with the US-based FLEX standard, a rivalry seen at the time as damaging to the development of the paging industry in Europe.
Pagination, also known as paging, is the process of dividing a document into discrete pages, either electronic pages or printed pages.. In reference to books produced without a computer, pagination can mean the consecutive page numbering to indicate the proper order of the pages, which was rarely found in documents pre-dating 1500, and only became common practice c. 1550, when it replaced ...
Subsequent early machines, and their operating systems, supporting paging include the IBM M44/44X and its MOS operating system (1964), [6] the SDS 940 [7] and the Berkeley Timesharing System (1966), a modified IBM System/360 Model 40 and the CP-40 operating system (1967), the IBM System/360 Model 67 and operating systems such as TSS/360 and CP ...
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 ...
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