книги Наука, техника, медицина Техника Теоретические основы Теория упругости Теория машин и механизмов

Panel switch

Код 2470658

  • ISBN: 978-5-5120-7553-1

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High Quality Content by WIKIPEDIA articles! The panel switching system was an early type of automatic telephone exchange, first put into urban service by the Bell System in the 1920s and removed during the 1970s. The Panel and Rotary systems were developed in parallel by Bell Labs before World War I, and had many features in common, though the Rotary system was used in Europe.

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ISBN: 978-5-5120-7553-1

Книга находится в категориях

Общая и теоретическая социология Компьютеры и Интернет

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