Private Manual Branch EXchange - определение. Что такое Private Manual Branch EXchange
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Что (кто) такое Private Manual Branch EXchange - определение

TELECOMMUNICATIONS SYSTEM
Cordboard; Manual exchange
  • PBX switchboard, 1975
  • U.S. Air Force]] operator works a switchboard in the underground command post at [[Strategic Air Command]] headquarters, [[Offutt Air Force Base]], [[Nebraska]] in 1967.
  • A large [[Bell System]] international switchboard in 1943
  • Telephone operator, c. 1900

Private Manual Branch eXchange      
<communications> (PMBX) The original manual equivalent of a PABX; a PMBX involves company employed operators manually switching each call using a manual switchboard. (1998-08-07)
Private Branch Exchange         
  • A 1930s key telephone for a private branch exchange.
  • An Avaya G3si PBX with front cover removed (view from the top)
  • Racks of a Strowger telephone exchange from 1989, showing two-motion selectors in the United Kingdom.
MULTILINE TELEPHONE SYSTEM TYPICALLY USED IN BUSINESS ENVIRONMENTS
Private branch exchange; PABX; Hosted pbx; Follow-me; Key System Unit; Key phone system; Key system unit; Private Branch eXchange; Private Automated Branch eXchange; Private business exchange; EPABX; Digital PABX; Digital pabx; Digital PBX; Digital pbx; Key Telephone System; Key service unit; Private Branch Exchange; Business communications system; PBX/IPBX; Key Telephone Unit; Key telephone system; Hpbx; Mpbx; Hosted PBX; Virtual PBX; Direct Inward Systems Access; PABX features; Hosted PBX systems; Hosted PBX system; Virtual PBX systems; Virtual PBX system; Phone system
<communications> (PBX) A telephone exchange local to a particular organisation who use, rather than provide, telephone services. The earliest PBXs were manual ({Private Manual Branch EXchange}, PMBX) but are now more likely to be automatic (Private Automatic Branch eXchange). (1997-06-25)
PABX         
  • A 1930s key telephone for a private branch exchange.
  • An Avaya G3si PBX with front cover removed (view from the top)
  • Racks of a Strowger telephone exchange from 1989, showing two-motion selectors in the United Kingdom.
MULTILINE TELEPHONE SYSTEM TYPICALLY USED IN BUSINESS ENVIRONMENTS
Private branch exchange; PABX; Hosted pbx; Follow-me; Key System Unit; Key phone system; Key system unit; Private Branch eXchange; Private Automated Branch eXchange; Private business exchange; EPABX; Digital PABX; Digital pabx; Digital PBX; Digital pbx; Key Telephone System; Key service unit; Private Branch Exchange; Business communications system; PBX/IPBX; Key Telephone Unit; Key telephone system; Hpbx; Mpbx; Hosted PBX; Virtual PBX; Direct Inward Systems Access; PABX features; Hosted PBX systems; Hosted PBX system; Virtual PBX systems; Virtual PBX system; Phone system
¦ abbreviation private automatic branch exchange.

Википедия

Telephone switchboard

A telephone switchboard was a device used to connect circuits of telephones to establish telephone calls between users or other switchboards, throughout the 20th century. The switchboard was an essential component of a manual telephone exchange, and was operated by switchboard operators who used electrical cords or switches to establish the connections.

The electromechanical automatic telephone exchange, invented by Almon Strowger in 1888, gradually replaced manual switchboards in central telephone exchanges around the world. In 1919, the Bell System in Canada also adopted automatic switching as its future technology, after years of reliance on manual systems.

Nevertheless, many manual branch exchanges remained operational into the second half of the 20th century in many enterprises. Later electronic devices and computer technology gave the operator access to an abundance of features. A private branch exchange (PBX) in a business usually has an attendant console, or an auto-attendant function, which bypasses the operator.