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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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Phantom Ciruits (1 jan 1921 ano – 31 dez 1921 ano)

Descrição:

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.

Adicionado na linha do tempo:

click for descriptions/PHONE TIMLINE

ByJasun Foley
23 out 2018
0
0
420

Data:

1 jan 1921 ano
31 dez 1921 ano
~ 12 months
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