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Prior to the toll-free long distance market was opened to competition after 1986, a customer may have had a multi-carrier toll free number assigned by the Local Exchange Company for intrastate callers and an order placed with a long distance company for interstate callers.
Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
The plan divided most of North America into eighty-six numbering plan areas (NPAs). Each NPA was assigned a unique three-digit code, typically termed NPA code or simply area code. These codes were first used in Operator Toll Dialing by long-distance operators in establishing calls via trunks between toll offices. The goal of automatic service ...
Verizon High Speed Internet is available in Delaware, Massachusetts, Maryland, New York, New Jersey, Pennsylvania, Rhode Island, Virginia, and Washington, D.C. where Verizon has coverage. [1] Availability and speed are determined by the presence of a DSLAM in the local central office or remote terminal and the overall local loop length/distance ...
Though Guam is a United States territory, some U.S. long-distance plans and courier services list Guam as an international location.As a result of Guam's being added to the North American Numbering Plan (NANP) in 1997, calls made to the U.S., Canada, or other participating countries from Guam (or to Guam from other NANP locations) only require the caller to dial a 1 followed by the area code.
At the other end of the quality spectrum is a route using VoIP over the long-distance satellite link terminating in an ISP using a leaky PBX to terminate the calls. VoIP packets contain a lot of signaling overhead: to carry the 64k of data packet a conventional telecoms network transmits needs around 100k of bandwidth with VoIP.
The E.164 standard of the International Telecommunication Union is an international numbering plan and establishes a country calling code (country code) for each member organization. Country codes are prefixes to national telephone numbers that denote call routing to the network of a subordinate number plan administration, typically a country ...
The collection of permissible digit patterns, so called digit-maps, for a private telephone system or for customer premise equipment, such as an analog telephone adapter (ATA) or an IP phone, is sometimes also called dial plan. A pattern may be as short as a single digit, e.g. for reaching an operator, or as long as a complete international ...