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  2. Telephone keypad - Wikipedia

    en.wikipedia.org/wiki/Telephone_keypad

    A telephone keypad is a keypad installed on a push-button telephone or similar telecommunication device for dialing a telephone number. It was standardized when the dual-tone multi-frequency signaling (DTMF) system was developed in the Bell System in the United States in the 1960s – this replaced rotary dialing , that had been developed for ...

  3. Lists of North American area codes - Wikipedia

    en.wikipedia.org/wiki/Lists_of_North_American...

    The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union.

  4. Telephone number - Wikipedia

    en.wikipedia.org/wiki/Telephone_number

    A telephone number is a sequence of digits assigned to a landline telephone subscriber station connected to a telephone line or to a wireless electronic telephony device, such as a radio telephone or a mobile telephone, or to other devices for data transmission via the public switched telephone network (PSTN), or other public and private networks.

  5. Contempra - Wikipedia

    en.wikipedia.org/wiki/Contempra

    Contempra was the first phone designed in Canada, [1] previous Canadian sets having been designed in the US for Western Electric and built under licence. Contempra was highly stylized, using straight lines and oblique angles where curves and corners would be found on contemporary sets like the Trimline .

  6. Lineman's handset - Wikipedia

    en.wikipedia.org/wiki/Lineman's_handset

    A typical lineman's handset integrates an earpiece, a mouthpiece, a dialing interface, and a set of test leads for connecting to the telephone circuit. Originally, lineman's handsets featured a rotary dial , but modern sets use some variant of the standard 12-button DTMF keypad and also employ an amplifier for speaker use.

  7. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]

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    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. History of the telephone in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_the_telephone...

    The telephone played a major communications role in American history from the 1876 publication of its first patent by Alexander Graham Bell onward. In the 20th century the American Telephone and Telegraph Company (AT&T) dominated the telecommunication market as the at times largest company in the world, until it was broken up in 1982 and replaced by a system of competitors.