Search results
Results From The WOW.Com Content Network
The technology steadily advanced. Starting around the turn of the century, the dial telephone allowed users to place calls themselves without operator assistance. By mid-century, mobile radio telephone service became available to free users from fixed locations in some cities.
The concepts of the NANP were devised originally during the 1940s by the American Telephone and Telegraph Company (AT&T) for the Bell System and the independent telephone companies in North America in Operator Toll Dialing. The first task was to unify the diverse local telephone numbering plans that had been established during the preceding decades, with the goal to speed call completion times ...
The North American Numbering Plan Administration has divided the state of New York into twelve numbering plan areas (NPAs) with a total of 21 area codes.
Original North American area codes The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World War II period. The program had the goal of speeding the connecting times for long-distance calling by eliminating intermediary telephone operators. Expanding this ...
History In 1947, American Telephone and Telegraph (AT&T) published the first configuration of proposed numbering plan areas (NPAs) for a new nationwide numbering and toll call routing system. Indiana was divided to receive two area codes. Area code 317 served the northern two-thirds of Indiana, while area code 812 served the southern third.
Yahoo Voice was a Voice over Internet Protocol (VoIP), PC-PC, PC-Phone and Phone-to-PC telecommunications service. It was provided by Yahoo via its Yahoo Messenger instant messaging application. Yahoo Voice used the Session Initiation Protocol , GIPS codec and the Dialpad engine for voice transport.
Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.
Timeline of the telephone This timeline of the telephone covers landline, radio, and cellular telephony technologies and provides many important dates in the history of the telephone .