About: Direct distance dialing

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Direct distance dialing (DDD) is a telecommunication service feature in North America by which a caller may, without operator assistance, call any other user outside the local calling area. Direct dialing by subscribers typically requires extra digits to be dialed as prefixes to the directory telephone number of the destination. International Direct Distance Dialing (IDDD) extends the system beyond the geographic boundaries of the North American Numbering Plan (NANP).

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rdf:type	yago:WikicatTelecommunicationServices yago:Abstraction100002137 yago:Act100030358 yago:Activity100407535 yago:Event100029378 yago:PsychologicalFeature100023100 yago:Work100575741 yago:YagoPermanentlyLocatedEntity yago:Service100577525
rdfs:label	Selbstwähleinrichtung (de) Direct distance dialing (en) Interurbain automatique (fr) 장거리 직통 전화 (ko)
rdfs:comment	Eine Selbstwähleinrichtung ist in der Telekommunikation ein Mechanismus, mit dem ein Benutzer eine Wählverbindung herstellen kann, ohne dass diese von einem „Fräulein vom Amt“ manuell geschaltet wird. Die Teilnehmerselbstwahl wurde Ende des 19. Jahrhunderts durch die Automatisierung der Vermittlung ermöglicht. Zunächst wurden Wählscheiben verwendet, später setzten sich Tasten durch. Die erste Selbstwähleinrichtung patentierte Almon B. Strowger 1889, der auch 1892 die erste automatische Vermittlungsstelle La Porte, Indiana, einrichtete. (de) Direct distance dialing (DDD) is a telecommunication service feature in North America by which a caller may, without operator assistance, call any other user outside the local calling area. Direct dialing by subscribers typically requires extra digits to be dialed as prefixes to the directory telephone number of the destination. International Direct Distance Dialing (IDDD) extends the system beyond the geographic boundaries of the North American Numbering Plan (NANP). (en) L'interurbain automatique (en anglais, direct distance dialing ou DDD) est une fonction du service téléphonique qui permet à un appelant, sans l'assistance d'un téléphoniste, d'appeler un autre utilisateur en dehors de sa zone d'appel local. L'interurbain automatique nécessite généralement la composition d'un ou de plusieurs chiffres supplémentaires avant la composition du numéro de téléphone à rejoindre. (fr) 장거리 직통 전화(長距離直通電話, direct distance dialing; DDD)는 과의 연결 없이 바로 걸 수 있는 이다. 자동즉시식 통화, 다이얼(dial)식 통화라고도 한다. 시외통화는 오랫동안 수동식이었다. 가입자가 교환수에게 신청하면 교환수가 중계국의 교환수를 차례로 통하여 상대방 가입자를 호출하여 비로소 통화가 가능한 것이다. 도중의 중계국에서 시외회선이 사용되고 있을 경우에는 오랫동안 기다려야만 한다. 가입자가 직접 다이얼을 돌려 즉각 상대자를 호출하는 것은 전화 이용자의 꿈이었다.그런데, 대한민국에서는 1971년 3월에 서울－부산 간 장거리 자동전화의 개통을 본 이후, 점차로 이 방식을 전국 주요도시에 확대하여 직접 다이얼을 돌리면 통화할 수 있게 되었다. 89년말 현재 장거리 통신의 회선수는 전신용 5,064회선, 전화용 35만1,456회선 등 총 35만6,520회선이다.방식별로는 전신방식 5,064회선, M/W 4만6,800회선, 동축반송 7만668회선, 케이블반송 804회선, 광통신 12만 7,176회선, 기타 10만6,008회선이며, 장거리 통신망의 디지털화율은 72.8%이다. 국제전송로는 위성통신 3,682회선, 스켓타 504회선, 해저케이블 1,200회선 등 5,386회선을 보유하고 있다. 83년 처음 개통된 국제자동전화(ISD) 이용지역은 89년말 현재 153개국 180개 지역이다. (ko)
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dct:subject	Telecommunications-related introductions in 1951 Telecommunication services
Wikipage page ID	41046 (xsd:integer)
Wikipage revision ID	1102535460 (xsd:integer)
Link from a Wikipage to another Wikipage	5XB switch Providence, Rhode Island Punched cards Quebec San Francisco San Francisco Bay Area Electronic switching system M. Leslie Denning Boston Detroit Area code 215 Area code 216 Area code 312 Area code 313 Area code 318 Area code 401 Area code 412 Area code 414 Telecommunications-related introductions in 1951 List of Caribbean islands Number pooling North American Numbering Plan Telecommunication services Commonwealth of Nations Sacramento, California Cleveland Elizabeth II Englewood, New Jersey Golden Gate Westmount, Quebec 1958 in the United Kingdom Long-distance call Lord Provost Louisiana Common control Competitive local exchange carrier Yukon Frank Osborne (California politician) Operator assistance Panel switch Party line (telephony) Strowger switch Automatic Number Identification Toronto East Bay (San Francisco Bay Area) Local number portability 32 Avenue of the Americas Alameda, California Four-wire circuit Telephone exchange Teaneck, New Jersey Information and communications technology Traffic Service Position System Signaling System No. 5 Area code Area code 916 Chicago Area code 415 Philadelphia Pittsburgh Milwaukee New Jersey Oakland, California Ontario Automatic Message Accounting Marker (telecommunications) Multi-frequency User (telecommunications) Trunking Compelled signaling Telephone exchange names Whitehorse Off-hook Area code 617 1XB switch Subscriber trunk dialing Call originator Multifrequency

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