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Please see the relevant discussion on the talk page. | Number pooling is a method of reallocating telephony numbering space in the North American Numbering Plan, primarily in growth areas in the United States. Wikipedia does not have an article with this exact name. ...
A telephone handset A touch-tone telephone dial Telephone The telephone or phone (Greek: tele = far away and phone = voice) is a telecommunications device that transmits speech by means of electric signals. ...
A numbering plan is a type of numbering scheme used in telecommunications. ...
The North American Numbering Plan (NANP) is a system for three-digit area codes that direct telephone calls to particular regions on a public switched telephone network (PSTN), where they are further routed by the local network. ...
Originally, in North America, individual telephone exchanges were assigned entire individual prefixes, with all the 10,000 possible numbers having that prefix being available (and only available) to that exchange. ("Prefix", "NXX", and "exchange" are synonymous terms in NANP telephony.) Typically, one exchanged served one municipality (or rarely, groups of closely associated municipalities). As the growth of an area led to increased demands for phone numbers, more prefixes would be added. central office = Exchange building in the U.S. telephone exchange = Exchange building in the UK, and is also the UK name for a telephone switch, and also has a technical meaning in U.S. telecoms telephone switch is the U.S. term, but is in increasing use in technical UK...
A municipality or general-purpose district (compare with: special-purpose district) is an administrative local area generally composed of a clearly defined territory and commonly referring to a city, town, or village government. ...
Along with the advent of competition among telephone carriers, as well as wireless telephone providers, each individual carrier serving a given municipality required its own prefixes. This began to put pressure on the prefixes available within high-growth and high-competition areas, and led to a rapid increase in the introduction of new area codes. In general, a carrier is a system with a specific property or is attributed of something (in physical or in abstract sense). ...
Wireless was an old-fashioned term for a radio receiver, referring to its use as a wireless telegraph. ...
A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ...
By the early 1990s, the NANPA was forced to change the format rules to increase the number of valid area codes. Previously, all area codes had 0 or 1 as their second (middle) digit; the rule change allowed any digit as the second digit. // Events and trends The 1990s are generally classified as having moved slightly away from the more conservative 1980s, but otherwise retaining the same mindset. ...
However, public resistance to the introduction of new area codes, even overlay plans which allowed customers to keep their existing numbers (as opposed to split plans where the area code of existing numbers changes), prompted the FCC and state telecommunications commissions to introduce and encourage the allocation of number space in smaller blocks of 1,000 numbers, with each block consisting of a prefix and the first digit after the prefix. Local exchange routing databases now include a "block ID" to indicate the ownership of the specific sub-blocks within a prefix. The FCCs official seal. ...
Telecommunication is the extension of communication over a distance. ...
The Local Exchange Routing Guide, commonly known as The LERG, is a database of NPA/NXX published every month by Telcordia Technologies. ...
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