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Before direct distance dialing (DDD), all long-distance calls were established by special switchboard operators (long-distance operators) even in exchanges where calls within the local exchange were dialed directly. Completion of long-distance calls was time-consuming and costly as each call was handled by multiple operators in multiple cities.
Long-distance calls within a numbering plan area may also require dialing of an extra digit. Eleven digits for toll calls became standard in all of North America by the end of 1994 to allow introduction of " interchangeable NPA codes "—area codes that did not have a 0 or 1 as the middle digit and could therefore be confused with the central ...
The first direct-dialed long-distance telephone calls were possible in the New Jersey communities of Englewood and Teaneck.Customers of the ENglewood 3, ENglewood 4 and TEaneck 7 exchanges, who could already dial telephone numbers in the New York City area, could place calls to eleven major cities across the United States by dialing the three-digit area code and the seven-digit directory number.
Ask 10 people the cheapest way to make long distance calls, and you'll get 20 different answers. The field is wide open, with calling cards, cell phone plans, Voice-over-Internet Protocol (VoIP ...
Long-distance calls have higher prices. As regulators in North America had long allowed long-distance calling to be priced artificially high in return for artificially low rates for local service, subscribers tended to make toll calls rarely and to keep them deliberately brief. [citation needed]
Originally they were placed via long-distance operators. The calls were transmitted by cable, communications satellite, radio, and more recently, fiber optics and Voice over Internet Protocol (VoIP). International direct dialling was introduced in the 1970s, so calls can be dialed by country code without an operator.
Direct-distance dialing (DDD) was first introduced in areas with common-control switching (panel and crossbar) in the 1950s.These areas had used 411 for directory assistance, and because of the ability of common-control switching to analyze the initial digits of a number in a "sender" before routing the call, these areas did not require the dialing of an initial 1 to initiate a long-distance call.
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