History of the telephone

The first telephone system in the history of the telephone

The first telephone system was known as the exchange. This first telephone system, the exchange, was a practical means of communicating between many people who have telephones. It was installed in Hartford, Connecticut in 1877. The first exchange telephone system linking two major cities was established between New York and Boston in 1883. The first exchange telephone system outside the United States was built in London in 1879. The exchange telephone system involves a group of operators working at a large switchboard.

Switchboard telephone system

The operator of the exchange telephone system would answer an incoming telephone call and connect it manually to the party being called. The first automatic telephone exchange was patented by Almon Strowger of Kansas City in 18791 and installed in 1892. Manual swtichboards telephone system remained in common use until the middle of the twentieth century.

The first telephones in the history of the telephone - facts

• The first coin operated pay telephone was patented by William Gray of Hartford in 1889.
• The first rotary dial telephone in the history of hte telephone was developed in 1923 by Antoine Barnay in France.
• the first mobile telephone was invented by Bell Telephone company and introduced into New York City police cars in 1924.
• The first commercial mobile telephone device became available in St., Louis, Missouri in 1946.
• The mobile telephone became common another four decades later.

How the cellular telephone system began in the history of the telephone

In 1978, American Telephone and Telegraph 's (AT&T) Bell Laboratories began testing a mobile telephone system based in hexagonal geographical regions called cells.  As the caller 's vehicle passed from one cell to another, an automatic switching system would transfer the telephone call to another cell without interruption. The cellular telephone system began nationwide usage in the United States in  1981.