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  2. 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.

  3. Telephone exchange - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange

    1924 PBX switchboard With manual service , the customer lifts the receiver off-hook and asks the operator to connect the call to a requested number. Provided that the number is in the same central office, and located on the operator's switchboard, the operator connects the call by plugging the ringing cord into the jack corresponding to the ...

  4. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    DMS-10M (prepackaged DMS-10, a Community Dial Office in a pre-packaged container/"box") DMS-100 family DMS-100 (large local digital Class 5) (also known as an SL-100 when used as CPE (Customer Provided Equipment or PBX service) also known as Centrex. A Nortel DMS-100e used by an operator to offer local and long-distance services in France

  5. Business telephone system - Wikipedia

    en.wikipedia.org/wiki/Business_telephone_system

    A PBX is a telephone exchange or switching system that serves a private organization. A PBX permits the sharing of central office trunks between internally installed telephones, and provides intercommunication between those internal telephones within the organization without the use of external lines. [7]

  6. Switchboard operator - Wikipedia

    en.wikipedia.org/wiki/Switchboard_operator

    A telephone switchboard is a device that allows telephone lines to be interconnected, enabling the routing of calls between different phones or phone networks. [17] The switchboard operator was a person who manually connected calls by plugging and unplugging cords on the switchboard.

  7. AT&T Merlin - Wikipedia

    en.wikipedia.org/wiki/AT&T_Merlin

    The General Purpose Adapter is a small box about the size of two packs of playing cards and connects through the Other Port on the underside of most Merlin voice terminals, providing power and voice connectivity in one proprietary Other cable. The connected analog device shares the extension and call of the Merlin phone it is connected with.

  8. Nortel Meridian - Wikipedia

    en.wikipedia.org/wiki/Nortel_Meridian

    It was introduced by Northern Telecom in December 1974 at the USITA convention in San Francisco, with an original capacity from 100 to 7,600 lines, and became the first fully digital PBX announced on the global market aimed at the smaller PBX market. In the early 1970s, most PBXs were either electromechanical (e.g. cross-bar) or based on a ...

  9. BT Versatility - Wikipedia

    en.wikipedia.org/wiki/BT_Versatility

    The BT Versatility is a telephone PBX switchboard sold by BT and targeted at small businesses. It is manufactured by Taratel Communications previously Lake Communications in Ireland as the OfficeLink.

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