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- Extension_(telephone) abstract "In residential telephony, an extension telephone is an additional telephone wired to the same telephone line as another. In middle 20th century telephone jargon, the first telephone on a line was a "Main Station" and subsequent ones "Extensions". Such extension phones allow making or receiving calls in different rooms, for example in a home, but any incoming call would ring all extensions and any one extension being in use would cause the line to be busy for all users. Some telephones intended for use as extensions have built in intercom features; a key telephone system for a small business may offer two to five lines, lamps indicating lines already in use, the ability to place calls on 'hold' and an intercom on each of the multiple extensions.In business telephony, a telephone extension may refer to a phone on an internal telephone line attached to a private branch exchange (PBX) or Centrex system. The PBX operates much as a community switchboard does for a geographic telephone numbering plan and allows multiple lines inside the office to connect without each phone requiring a separate outside line. In these systems, one usually has to dial a number (typically 9 in North America, 0 in Europe) to tell the PBX to connect with an outside landline (also called DDCO, or Direct Dial Central Office) to dial an external number. Within the PBX, the user merely dials the extension number to reach any other user directly. For inbound calls, a switchboard operator or automated attendant may request the number of the desired extension or the call may be completed with direct inbound dialing if outside numbers are assigned to individual extensions.An off-premises extension, where a worker at a remote location employs a telephone configured to appear as if it were an extension located at the main business site, may be created in analog telephony by using a leased line to connect the extension to the main enterprise system. Voice over IP makes the creation of off-premises extensions inexpensive and trivial as broadband Internet and virtual private networking can extend local network access anywhere in the world. In either system, an off-premises extension is reachable from within the same enterprise simply by calling its extension number directly; for inbound and outgoing calls, it functions as if it were located at the main place of business.".
- Extension_(telephone) wikiPageID "4800913".
- Extension_(telephone) wikiPageLength "3521".
- Extension_(telephone) wikiPageOutDegree "25".
- Extension_(telephone) wikiPageRevisionID "680487365".
- Extension_(telephone) wikiPageWikiLink Automated_attendant.
- Extension_(telephone) wikiPageWikiLink Automatic_message_accounting.
- Extension_(telephone) wikiPageWikiLink Business_internal_dialing.
- Extension_(telephone) wikiPageWikiLink Business_telephone_system.
- Extension_(telephone) wikiPageWikiLink Category:Local_loop.
- Extension_(telephone) wikiPageWikiLink Category:Telephony_equipment.
- Extension_(telephone) wikiPageWikiLink Centrex.
- Extension_(telephone) wikiPageWikiLink Direct_inbound_dialing.
- Extension_(telephone) wikiPageWikiLink Direct_inward_dial.
- Extension_(telephone) wikiPageWikiLink Hold_(telephone).
- Extension_(telephone) wikiPageWikiLink Hotel.
- Extension_(telephone) wikiPageWikiLink Intercom.
- Extension_(telephone) wikiPageWikiLink Key_telephone_system.
- Extension_(telephone) wikiPageWikiLink Leased_line.
- Extension_(telephone) wikiPageWikiLink Motel.
- Extension_(telephone) wikiPageWikiLink Off-premises_extension.
- Extension_(telephone) wikiPageWikiLink Private_branch_exchange.
- Extension_(telephone) wikiPageWikiLink Switchboard_operator.
- Extension_(telephone) wikiPageWikiLink Telephone.
- Extension_(telephone) wikiPageWikiLink Telephone_line.
- Extension_(telephone) wikiPageWikiLink Telephone_number.
- Extension_(telephone) wikiPageWikiLink Telephone_numbering_plan.
- Extension_(telephone) wikiPageWikiLink Trunking.
- Extension_(telephone) wikiPageWikiLink Virtual_private_network.
- Extension_(telephone) wikiPageWikiLink Voice_over_IP.
- Extension_(telephone) wikiPageWikiLinkText "Extension (telephone)".
- Extension_(telephone) wikiPageWikiLinkText "Extension".
- Extension_(telephone) wikiPageWikiLinkText "extension number".
- Extension_(telephone) wikiPageWikiLinkText "extension phone".
- Extension_(telephone) wikiPageWikiLinkText "extension telephone".
- Extension_(telephone) wikiPageWikiLinkText "extension".
- Extension_(telephone) wikiPageWikiLinkText "extensions".
- Extension_(telephone) wikiPageWikiLinkText "telephone extension".
- Extension_(telephone) wikiPageWikiLinkText "telephone extensions".
- Extension_(telephone) hasPhotoCollection Extension_(telephone).
- Extension_(telephone) wikiPageUsesTemplate Template:Split.
- Extension_(telephone) subject Category:Local_loop.
- Extension_(telephone) subject Category:Telephony_equipment.
- Extension_(telephone) hypernym Telephone.
- Extension_(telephone) type Company.
- Extension_(telephone) comment "In residential telephony, an extension telephone is an additional telephone wired to the same telephone line as another. In middle 20th century telephone jargon, the first telephone on a line was a "Main Station" and subsequent ones "Extensions". Such extension phones allow making or receiving calls in different rooms, for example in a home, but any incoming call would ring all extensions and any one extension being in use would cause the line to be busy for all users.".
- Extension_(telephone) label "Extension (telephone)".
- Extension_(telephone) sameAs Nebenstelle.
- Extension_(telephone) sameAs 内線電話.
- Extension_(telephone) sameAs Ramal_telefônico.
- Extension_(telephone) sameAs m.0cnx5v.
- Extension_(telephone) sameAs Q457875.
- Extension_(telephone) sameAs Q457875.
- Extension_(telephone) wasDerivedFrom Extension_(telephone)?oldid=680487365.
- Extension_(telephone) isPrimaryTopicOf Extension_(telephone).