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Telephone Exchange Names
A telephone exchange name or central office name was a distinguishing and memorable name assigned to a telephone exchange, central office. It identified the switching system to which a telephone was connected, and facilitated the connection of telephone calls between switching systems in different localities. While small towns and rural areas might each be served by a single exchange, large cities were served by multiple switching systems, either distributed in the community constituting multiple exchange areas, or sometimes hosted in the same building to serve a densely populated area. Central offices were usually identified by names that were locally significant. The leading letters of a central office name were used as the leading components of the telephone number representation, so that each telephone number in the area was unique. These letters were mapped to the digits of the dial, which was indicated visibly on the dial's numbering plate. Several systematic telephone numb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panel Switch
The Panel Machine Switching System is a type of automatic telephone exchange for urban service that was used in the Bell System in the United States for seven decades. The first semi-mechanical types of this design were installed in 1915 in Newark, New Jersey, and the last were retired in the same city in 1983. The Panel switch was named for its tall panels which consisted of layered strips of terminals. Between each strip was placed an insulating layer, which kept each metal strip electrically isolated from the ones above and below. These terminals were arranged in ''banks'', five of which occupied an average selector frame. Each bank contained 100 sets of terminals, for a total of 500 sets of terminals per frame. At the bottom, the frame had two electric motors to drive sixty selectors up and down by electromagnetically controlled clutches. As calls were completed through the system, selectors moved vertically over the sets of terminals until they reached the desired location, at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telus Communications
Telus Communications Inc. (TCI) is the wholly owned principal subsidiary of Telus Corporation, a Canadian national telecommunications company that provides a wide range of telecommunications products and services including internet access, voice, entertainment, healthcare, video, smart home automation and IPTV television. The company is based in the Vancouver, British Columbia, area; it was originally based in Edmonton, Alberta, before its merger with BC Tel in 1999. Telus' wireless division, Telus Mobility, offers UMTS- and LTE-based mobile phone networks. Telus is the incumbent local exchange carrier in British Columbia and Alberta. Its primary competitors are Rogers Communications and Bell Canada. Telus is a member of the British Columbia Technology Industry Association. History Telus Corporation was formed in 1990 by the government of Alberta as a holding company to facilitate the privatization of Alberta Government Telephones (AGT), a crown corporation that p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Canada
Bell Canada (commonly referred to as Bell) is a Canadian telecommunications company headquartered at 1 Carrefour Alexander-Graham-Bell in the borough of Verdun, Quebec, in Canada. It is an ILEC (incumbent local exchange carrier) in the provinces of Ontario and Quebec; as such, it was a founding member of the Stentor Alliance. It is also a Competitive local exchange carrier, CLEC (competitive local exchange carrier) for enterprise customers in the western provinces. Its subsidiary Bell Aliant provides services in the Atlantic provinces. It provides mobile service through its Bell Mobility (including Individual branding, flanker brand Virgin Plus) subsidiary, and television through its Bell Satellite TV (direct broadcast satellite) and Bell Fibe TV (IPTV) subsidiaries. Bell Canada's principal competitors are: Rogers Communications in Ontario and Western Canada, Telus Communications in Quebec and Western Canada, Quebecor (Videotron) in Quebec plus other Global Wireless Infrastruct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Of Pennsylvania
Verizon Pennsylvania LLC, formerly traded as Bell of Pennsylvania, is the Bell Operating Company serving most of Pennsylvania. The company was founded in 1879 as Bell Telephone Company of Philadelphia, owned by National Bell Telephone Company, which later became American Bell. In 1899, the company became a subsidiary of American Telephone and Telegraph Company following its buyout of American Bell. The company is separate from Verizon North, which consists of former GTE-owned assets in rural Pennsylvania. History The company was founded in 1879 to serve Philadelphia. In 1907, the company changed its name to The Bell Telephone Company of Pennsylvania, a name under which it began to expand. In 1918, the company embarked on a series of acquisitions enlarging its coverage area from Philadelphia to statewide. In 1918, it acquired Central District Telephone. In 1924, it acquired Pittsburgh and Allegheny Telephone. In 1925, Bell of Pennsylvania made a $1.84 million acquisition o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
555 (telephone Number)
The telephone number prefix 555 is a central office code in the North American Numbering Plan, used as the leading part of a group of 10,000 telephone numbers, ''555-....'', in each numbering plan area (NPA) (area code). It has traditionally been used only for the provision of directory assistance, when dialing NPA-555-1212. *555 is used in New Zealand as a free mobile telephone number to report road incidents. The central office code is also used for fictitious telephone numbers in North American television shows, films, video games, and other media in order to prevent practical jokers and curious callers from bothering telephone subscribers and organizations by calling telephone numbers they see in works of fiction. Usage North America In 1994, the North American Numbering Plan Administration began accepting applications for nationwide 555-numbers (outside the fictitious 555-01XX range). A number could be reserved for a single area code, for a region, or for nationwide ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Office Code
The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Numbering Zone 1 and has the country code ''1''. Some North American countries, most notably Mexico, do not participate in the NANP. The concepts of the NANP were devised originally during the 1940s by the American Telephone and Telegraph Company (AT&T) for the Bell System and the independent telephone companies in North America in Operator Toll Dialing. The first task was to unify the diverse local telephone numbering plans that had been established during the preceding decades, with the goal to speed call completion times and decrease the costs for long-distance calling, by reducing manual labor by switchboard operators. Eventually, it prepared the continent for direct-dialing of long-distance calls by customers, first possible in 1951, which expanded across the na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wrigley Field
Wrigley Field is a ballpark on the North Side, Chicago, North Side of Chicago, Illinois. It is the home ballpark of Major League Baseball's Chicago Cubs, one of the city's two MLB franchises. It first opened in 1914 as Weeghman Park for Charles Weeghman's Chicago Whales of the Federal League, which folded after the 1915 in baseball, 1915 baseball season. The Cubs played their first home game at the park on April 20, 1916 Chicago Cubs season, 1916, defeating the 1916 Cincinnati Reds season, Cincinnati Reds 7–6 in 11 innings. Chewing gum magnate William Wrigley Jr. of the Wrigley Company acquired the Cubs in 1921 Chicago Cubs season, 1921. It was named Cubs Park from 1920 Chicago Cubs season, 1920 to 1926 Chicago Cubs season, 1926, before changing its name to Wrigley Field in 1927 Chicago Cubs season, 1927. The stadium currently seating capacity, seats 41,649 people. In the North Side Community areas in Chicago, community area of Lakeview, Chicago, Lakeview in the Lakeview, Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbus, Ohio
Columbus (, ) is the List of capitals in the United States, capital and List of cities in Ohio, most populous city of the U.S. state of Ohio. With a 2020 United States census, 2020 census population of 905,748, it is the List of United States cities by population, 14th-most populous city in the U.S., the second-most populous city in the Midwestern United States, Midwest (after Chicago), and the third-most populous U.S. state capital (after Phoenix, Arizona, and Austin, Texas). Columbus is the county seat of Franklin County, Ohio, Franklin County; it also extends into Delaware County, Ohio, Delaware and Fairfield County, Ohio, Fairfield counties. The Columbus metropolitan area, Ohio, Columbus metropolitan area encompasses ten counties in central Ohio and had a population of 2.14 million in 2020, making it the Ohio statistical areas, largest metropolitan area entirely in Ohio and Metropolitan statistical area, 32nd-largest metro area in the U.S. Columbus originated as several Nat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco
San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of 2024, San Francisco is the List of California cities by population, fourth-most populous city in the U.S. state of California and the List of United States cities by population, 17th-most populous in the United States. San Francisco has a land area of at the upper end of the San Francisco Peninsula and is the County statistics of the United States, fifth-most densely populated U.S. county. Among U.S. cities proper with over 250,000 residents, San Francisco is ranked first by per capita income and sixth by aggregate income as of 2023. San Francisco anchors the Metropolitan statistical area#United States, 13th-most populous metropolitan statistical area in the U.S., with almost 4.6 million residents in 2023. The larger San Francisco Bay Area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seven-digit Dialing
Seven-digit dialing is a telephone dialing procedure customary in some territories of the North American Numbering Plan (NANP) for dialing telephone numbers in the same numbering plan area (NPA). NANP telephone numbers consist of ten digits, of which the leading three are the area code. In seven-digit dialing it is not necessary to dial the area code. The procedure is also sometimes known as ''local format'' or ''network format''. History Originally, telephone exchanges consisted of manual switchboards operated by switchboard operators. Telephone numbers had typically two to four digits, depending on the size of the community. As the number of subscribers grew, multiple exchanges served individual neighborhoods of large cities. Multiple exchanges were identified by a central office name and typically four digits, such as "Pennsylvania 5000". A rural telephone number, often party line, had often up to four digits and a letter or letter and digits to indicate which of the multiple p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American Numbering Plan
The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1, World Numbering Zone 1 and has the telephone country code, country code ''1''. Some North American countries, most notably Telephone numbers in Mexico, Mexico, do not participate in the NANP. The concepts of the NANP were devised originally during the 1940s by the American Telephone and Telegraph Company (AT&T) for the Bell System and the independent telephone companies in North America in Operator Toll Dialing. The first task was to unify the diverse local telephone numbering plans that had been established during the preceding decades, with the goal to speed call completion times and decrease the costs for long-distance calling, by reducing manual labor by switchboard operators. Eventually, it prepared the continent for direct-dialing of long-distance calls ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
