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direct distance dialing

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.01 sec.
direct distance dialing [də¦rekt ¦dis·təns ′dīl·iŋ]
(communications)
A telephone exchange service that allows a telephone user to dial subscribers outside the local area using a standard routing pattern from the local or end office.


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and any country providing International Direct Distance Dialing (IDDD).
Since the introduction of Direct Distance Dialing (DDD) in November 1951, telephone numbers have used the format N0/1X-NNX-XXXX where N is any digit two through nine and X is any digit.
BTC supports more than 123,000 connections in a 100% digital, fully automated switching system, providing direct distance dialing and data services to more than 100 countries through the United States, Canada, Europe and the Caribbean.
 
 
 
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