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  1. en.wikipedia.org

    Direct distance dialing (DDD) is a telecommunications 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.
  2. telephoneworld.org

    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.
  3. en.wikipedia.org

    On November 10, 1951, the first direct dial long-distance telephone call in North America was placed from Mayor M. Leslie Denning of Englewood, New Jersey to Mayor Frank Osborne of Alameda, California via AT&T's Bell System. [5] The ten digit call (seven digits plus a three-digit area code) was connected automatically within 18 seconds. [6]The first subscriber trunk dialing in the United ...
  4. DIRECT DISTANCE DIALING 11.1 INTRODUCTION Direct Distance Dialing (DDD) is a term used to designate calls dialed by customers to points outside their local or extended service area. When such calls are dialed by operators, the phrase "Operator Distance Dialing" is used. Distance Dialing (nationwide dialing) has been
  5. blogs.ubc.ca

    With the advent of network capabilities, the new Direct Distance Dialing came into effect on November 19, 1951, in Englewood, New Jersey and then to several other major US cities shortly thereafter. Direct distance dialing or direct dialed long distance calling is when the user initiates and completes a long distance call without
  6. thefreedictionary.com

    Define direct distance dialing. direct distance dialing synonyms, direct distance dialing pronunciation, direct distance dialing translation, English dictionary definition of direct distance dialing. n US and Canadian a service by which telephone subscribers can obtain long-distance calls by dialling direct without the aid of an operator ...
  7. alchetron.com

    Sep 13, 2024Direct distance dialing (DDD) is telecommunication service feature in 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 than for dialing within the local area or.

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  1. Direct distance dialing

    Direct distance dialing 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 extends the system beyond the geographic boundaries of the North American Numbering Plan. Wikipedia

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