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  2. AT&T Merlin - Wikipedia

    en.wikipedia.org/wiki/AT&T_Merlin

    AT&T Merlin five-button telephone (voice terminal) manufactured in early 1980. AT&T Merlin is a corporate telephone system by American Telephone and Telegraph (AT&T) that was introduced in late 1983, when it was branded American Bell Merlin. After the breakup of AT&T in 1984, it was rebranded and later also supplied by Lucent and Avaya.

  3. Switchboard operator - Wikipedia

    en.wikipedia.org/wiki/Switchboard_operator

    In the early days of telephony, companies used manual telephone switchboards, and switchboard operators connected calls by inserting a pair of phone plugs into the appropriate jacks. They were gradually phased out and replaced by automated systems, first those allowing direct dialing within a local area, then for long-distance and international ...

  4. Answering machine - Wikipedia

    en.wikipedia.org/wiki/Answering_machine

    A Panasonic answering machine with a dual compact cassette tape drive to record and replay messages. An answering machine, answerphone, or message machine, also known as telephone messaging machine (or TAM) in the UK and some Commonwealth countries, ansaphone or ansafone (from a trade name), or telephone answering device (TAD), is used for answering telephone calls and recording callers' messages.

  5. Telephone switchboard - Wikipedia

    en.wikipedia.org/wiki/Telephone_switchboard

    PBX switchboard, 1975. A telephone switchboard is a device used to connect circuits of telephones to establish telephone calls between users or other switchboards. The switchboard is an essential component of a manual telephone exchange, and is operated by switchboard operators who use electrical cords or switches to establish the connections.

  6. Bell System Practices - Wikipedia

    en.wikipedia.org/wiki/Bell_System_Practices

    A typical volume of Bell System Practices from the 1970s. The Bell System Practices (BSPs) is a compilation of technical publications which describes the best methods of engineering, constructing, installing, and maintaining the telephone plant of the Bell System under direction of AT&T and Bell Telephone Laboratories. [1]

  7. Voicemail - Wikipedia

    en.wikipedia.org/wiki/Voicemail

    AT&T developed a system called 1A Voice Storage System to support custom services including voicemail for the public telephone system. [14] It worked in conjunction with the companies 1A ESS and 5ESS systems. Development started in mid-1976, [15] with first deployment in early 1979. Friendly user service started in March 1980.

  8. Telephone exchange - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange

    The Bell System dial service implemented a feature called automatic number identification (ANI) which facilitated services like automated billing, toll-free 800-numbers, and 9-1-1 service. In manual service, the operator knows where a call is originating by the light on the switchboard jack field.

  9. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    System 85 (Previously made by AT&T) IP Office 400 (SOE, 403, 406, 406v2, 412), Replaced by IP Office 500 ... AN/TTC-22 100 Line Automatic/Manual Military Tactical ...

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