Analog cellular communications sent to the dustbin of history
Mobile communications of the first generation that faithfully served humanity for almost 30 years, starting this Monday, lost its last stronghold. In the United States , the license to maintain the AMPS standard networks owned by AT & T and Verizon Wireless has been terminated .
The AMPS (Advanced Mobile Phone System) standard network, first built in 1983 in Chicago by Bell, remained the most popular in North America for many years. The analog technology, devoid of any encryption of conversations (they could be eavesdropped by a conventional VHF receiver), operating in the 800 MHz band filled with interference, with limited bandwidth, which led to long minutes of connection waiting, it still had a number of obvious advantages. The coverage area of AMPS base stations is significantly larger than that of their GSM counterparts, which made the connection of this standard especially popular in sparsely populated areas.
Subsequently, AMPS was supplanted by more modern digital DAMPS, and then GSM. In Europe, the network of the first generation for many years worked on another standard - NMT (more recently, so beloved by national summer residents), but in recent years it has finally ceded its frequencies to CDMA2000 networks.
The AMPS (Advanced Mobile Phone System) standard network, first built in 1983 in Chicago by Bell, remained the most popular in North America for many years. The analog technology, devoid of any encryption of conversations (they could be eavesdropped by a conventional VHF receiver), operating in the 800 MHz band filled with interference, with limited bandwidth, which led to long minutes of connection waiting, it still had a number of obvious advantages. The coverage area of AMPS base stations is significantly larger than that of their GSM counterparts, which made the connection of this standard especially popular in sparsely populated areas.
Subsequently, AMPS was supplanted by more modern digital DAMPS, and then GSM. In Europe, the network of the first generation for many years worked on another standard - NMT (more recently, so beloved by national summer residents), but in recent years it has finally ceded its frequencies to CDMA2000 networks.
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Source: https://habr.com/ru/post/20465/
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