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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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Phantom Ciruits (1 ene 1921 año – 31 dic 1921 año)

Descripción:

The switching of large numbers of calls was made possible through the use of phantom circuits. This allowed three conversations to take place on two pairs of wires.

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ByJasun Foley
23 oct 2018
0
0
420

fecha:

1 ene 1921 año
31 dic 1921 año
~ 12 months
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