30
/it/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
179349
15825
1
Public Timelines FAQ
Public TimelinesFAQ
Public TimelinesFAQ
For educational institutions For teachers For students Open cabinet
For educational institutions For teachers For students Open cabinet
Creare
Create a timeline
Public timelines
Library
FAQ

23 dic 1878 anni - Telephone exchange.

Descrizione:

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

Aggiunto al nastro di tempo:

Line of time Hector de Jesús López Rosales

ByHector J Lopez
20 ott 2017

Data:

23 dic 1878 anni
Adesso
~ 145 years ago

Immagini:

About & FeedbackAccordoPrivatezzaBiblioteca
2024 © Time.Graphics
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL
Excellent (Trustpilot Reviews)
Based on 115+ reviews
Write your own review on Trustpilot.com