Modems: 60 years of hooking up

A visual guide to the history of the modem, from the 1950s to today.

By Benj Edwards, PC World |  Networking, slideshow

Acoustic Coupling 

In the days of the AT&T phone monopoly, only AT&T had the right to connect electronic devices directly to its telephone network. Companies got around this restriction by inventing the acoustic coupler, which hooked a radio or modem to the telephone system via a cradle in which the user placed a standard phone handset. This way, the modem would be acoustically but not electronically linked, thereby avoiding any possibility of "damage" to the phone system.

Photo: Jose Guerrera

Join us:
Facebook

Twitter

Pinterest

Tumblr

LinkedIn

Google+

NetworkingWhite Papers & Webcasts

See more White Papers | Webcasts

Answers - Powered by ITworld

Join us:
Facebook

Twitter

Pinterest

Tumblr

LinkedIn

Google+

Ask a Question