When were push button telephone invented?

Answer 1

Imagine a village, with 10 telephone subscribers. Each sub has 9 phones, connecting to each of the other nine subs. The network has 90 phones and 45 sets of wires.

This seems a bit cumbersome, not to mention costly, but there is much worse to come.

Consider now a small city, with 100,000 subscribers. Each sub must have 99,999 phones - a total of 9,999,900,000 phones. When a small city needs almost ten billion phones and five billion pairs of wires it obviously won't work.

There had to be a better way, and a switch board was the simplest answer.

Answer 2

Old telephone switchboards consisted of a bank of plugs and sockets. The plugs were attached to long, spring-loaded wires. When a call came into the switchboard, the operator would plug the relevant wire into the corresponding socket - connecting the call. At the end of the call, the wire was unplugged, and it retracted back into its start position. Check out the picture in the related link - you'll see what I mean !

Answer 3

The first telephone switchboard was invented and used in 1877. A year later, in 1888, Almon Strowger invented the automatic switchboard, which began to replace the manual version.

Answer 4

I think is in 1980s but when you look in wikipédia site, they say that the push button telephone was invented in 1940s.. !

Answer 5

The first switchboards were invented in Boston 1877

Answer 6

In 1891, American Almon B. Strowger patented the first automatic switchboard