Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Obtenir le Premium

Create a timeline

Public timelines

About & Feedback Un accord Confidentialité FAQ

Cabinet Get premium

Donate

23 déc. 1878 - Telephone exchange.

Description:

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

Ajouté au bande de temps:

Line of time Hector de Jesús López Rosales

ByHector J Lopez

20 oct. 2017

0

0

401

Date:

23 déc. 1878

Maintenaint

~ Il y a 146 ans

Les images:

About & Feedback Un accord Confidentialité FAQ

Cabinet Get premium

Donate

The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.

Secured with SSL