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23 dez 1878 ano - Telephone exchange.

Descrição:

1878 The first telephone exchange is set up in New Haven, USA. It consisted of a manual controller board of 21 subscribers.

Adicionado na linha do tempo:

Line of time Hector de Jesús López Rosales

ByHector J Lopez

20 out 2017

0

0

405

Data:

23 dez 1878 ano

Agora

~ 146 years ago

Imagens:

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