The public switched Telephone Network

Public switch Telephone Network

who to computer Aman by the same company organization and located close to each other need to communication it is often just to run a cable between them work this way however when the distance are large or there are many computer or the capable have to pass through a public road or other public right of Veda coast of running private cable are usually prohibited...

structure of the telephone system

soon after Alexander Graham Bell planted the telephone in 1876 just a few horse I head of his real Elsa Grave there was the aluminium demand for his new invention the initial market was for the seal of telephone which came in pairs it was up to the customer to single wire between them if a telephone it was up to the customer to string a single wire between them..

the politics of telephone

for decided prior 2984 the bell system provided both local and long distance service throughout most of the United state in the 1970 the US Federal Government come to believe that his was and legally Monopoly and sold to break it up the government won and on January 1st 1984 was broken up to into long line Bell operating companies and if you other pieces...