It is not clear where his idea of an automatic telephone exchange was originally conceived, but his patent application identifies him as being a resident of Kansas City, Missouri on March 10, 1891 . " "'
32.
In 1940, the present automatic telephone exchange building was opened enabling the telegraph operating room in the Post and Telegraph Office to be moved upstairs while the dispatch office and public counter remained on the ground floor.
33.
France is served by an extensive system of automatic telephone exchanges connected by modern networks of fiber-optic cable, coaxial cable, microwave radio relay, and a domestic satellite system; cellular telephone service is widely available, expanding rapidly, and includes roaming service to foreign countries.
34.
Russia is served by an extensive system of automatic telephone exchanges connected by modern networks of fiber-optic cable, coaxial cable, microwave radio relay, and a domestic satellite system; cellular telephone service is widely available, expanding rapidly, and includes roaming service to foreign countries.
35.
When automatic telephone exchanges were introduced in the UK, the code for the Merton and South Wimbledon telephone exchange was set as " 542 " and used the mnemonic " LIBerty ", based on the numbers on a telephone to which the letters are assigned.
36.
The first commercial automatic telephone exchange, designed by Almon Brown Strowger, opened in La Porte, Indiana on 3 November 1892, and used two telegraph-type keys on the telephone, which had to be operated the correct number of times to control the vertical and horizontal relay magnets in the exchange.
37.
The village was then soon dotted with power poles and criss-crossed with wires for both electricity and telephone, however, underground cables for telephones, along with an automatic telephone exchange in the village, saw the last of the multi-wired telephone poles removed in 1995 and only the electricity power poles remain.
38.
Convinced that it should be subscribers, rather than the operator, who chose who was called anecdotally, Strowger's undertaking business was losing clients to a competitor whose telephone-operator wife was intercepting and redirecting everyone who called Strowger he first conceived his invention in 1888, and patented the automatic telephone exchange in 1891.
