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Portable Commutator
The Portable Commutator was a telecommunications device that was used by the military during World War I. It was manufactured by Northern Electric Company Nortel Networks Corporation (Nortel), formerly Northern Telecom Limited, was a Canadian multinational telecommunications and data networking equipment manufacturer headquartered in Ottawa, Ontario, Canada. It was founded in Montreal, Quebec, .... It was used as a one-wire telegraphic switchboard. References {{telecom-stub Nortel products ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portable Commutator
The Portable Commutator was a telecommunications device that was used by the military during World War I. It was manufactured by Northern Electric Company Nortel Networks Corporation (Nortel), formerly Northern Telecom Limited, was a Canadian multinational telecommunications and data networking equipment manufacturer headquartered in Ottawa, Ontario, Canada. It was founded in Montreal, Quebec, .... It was used as a one-wire telegraphic switchboard. References {{telecom-stub Nortel products ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Electric Company
Nortel Networks Corporation (Nortel), formerly Northern Telecom Limited, was a Canadian multinational telecommunications and data networking equipment manufacturer headquartered in Ottawa, Ontario, Canada. It was founded in Montreal, Quebec, in 1895 as the Northern Electric and Manufacturing Company. Until an antitrust settlement in 1949, Northern Electric was owned principally by Bell Canada and the Western Electric Company of the Bell System, producing large volumes of telecommunication equipment based on licensed Western Electric designs. At its height, Nortel accounted for more than a third of the total valuation of all companies listed on the Toronto Stock Exchange (TSX), employing 94,500 people worldwide. In 2009, Nortel filed for bankruptcy protection in Canada and the United States, triggering a 79% decline of its corporate stock price. The bankruptcy case was the largest in Canadian history and left pensioners, shareholders and former employees with enormous losse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Canadian Encyclopedia
''The Canadian Encyclopedia'' (TCE; french: L'Encyclopédie canadienne) is the national encyclopedia of Canada, published online by the Toronto-based historical organization Historica Canada, with the support of Canadian Heritage. Available for free online in both English and French, ''The Canadian Encyclopedia'' includes more than 19,500 articles in both languages on numerous subjects including history, popular culture, events, people, places, politics, arts, First Nations, sports and science. The website also provides access to the ''Encyclopedia of Music in Canada'', the ''Canadian Encyclopedia Junior Edition'', ''Maclean's'' magazine articles, and ''Timelines of Canadian History''. , over 700,000 volumes of the print version of ''TCE'' have been sold and over 6 million people visit ''TCE'''s website yearly. History Background While attempts had been made to compile encyclopedic material on aspects of Canada, ''Canada: An Encyclopaedia of the Country'' (1898–1900), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephone Switchboard
A telephone switchboard was a device used to connect circuits of telephones to establish telephone calls between users or other switchboards, throughout the 20th century. The switchboard was an essential component of a manual telephone exchange, and was operated by switchboard operators who used electrical cords or switches to establish the connections. The electromechanical automatic telephone exchange, invented by Almon Strowger in 1888, gradually replaced manual switchboards in central telephone exchanges around the world. In 1919, the Bell System in Canada also adopted automatic switching as its future technology, after years of reliance on manual systems. Nevertheless, many manual branch exchanges remained operational into the second half of the 20th century in many enterprises. Later electronic devices and computer technology gave the operator access to an abundance of features. A private branch exchange (PBX) in a business usually has an attendant console, or an auto-atten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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