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.
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 !
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.
I think is in 1980s but when you look in wikipédia site, they say that the push button telephone was invented in 1940s.. !
In 1891, American Almon B. Strowger patented the first automatic switchboard
A push button dial is found on the telphone. It is the thing that you press the number
45-
Mobile.
because u puch the button
The telephone was not invented in Romania.
Telephone The telephone was invented in 1876.The light bulb was invented in 1879. The microwave was invented in 1945.
Telephone The telephone was invented in 1876.The light bulb was invented in 1879. The microwave was invented in 1945.
you push the button again
you push the bark button push the bark button
how push button interface with microcontrollor
He invented the telephone and when he was a kid he invented the wheat husker.
A Dash Push is a button that is fitted into the dash board of a car (short for Dashboard Push-Button)