In the field of telecommunications Telecommunication is the transmission of signals over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, drums, semaphore, flags or heliograph. In modern times, telecommunication typically involves the use of electronic devices such as telephones, television, radio or computers. Early, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central office is the physical building used to house inside plant Around the turn of the century, DSLAMs became an important part of telephone company inside plant. Inside plant will also have distribution frames and other equipment including passive optical network equipment including telephone switches, which make telephone calls A telephone call is a connection over a telephone network between the calling party and the called party "work" in the sense of making connections and relaying the speech information.
The term exchange can also be used to refer to an area served by a particular switch (typically known as a wire center in the US telecommunications industry). It is sometimes confused with other concepts of telephone geography, such as NPA or area code A telephone numbering plan is a system of allocating and routing telephone numbers in a telephone network. A closed numbering plan, such as found in North America, features fixed length area codes and local numbers. An open numbering plan features variance in length of area code or local number, or both. The term dial plan should not be confused. More narrowly, in some areas it can refer to the first three digits of the local number. In the three-digit sense of the word, other obsolete Bell System terms include office code and NXX. In the United States ^ b. English is the de facto language of American government and the sole language spoken at home by 80% of Americans age five and older. Spanish is the second most commonly spoken language, the word exchange can also have the legal meaning of a local access and transport area Local access and transport area is a term used in U.S. telecommunications regulation. It represents a geographical area of the United States under the terms of the Modification of Final Judgment (MFJ) that precipitated the breakup of the original AT&T into the "Baby Bells" or created since that time for wireline regulation under the Modification of Final Judgment In United States telecommunication law, Modification of Final Judgment is the 1982 agreement (consent decree) settling United States v. AT&T, a landmark antitrust suit. Entered into between the United States Department of Justice and the American Telephone & Telegraph Company (AT&T) the MFJ, after modification and upon approval of the (MFJ).
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Bloomberg
Schacht declined to comment yesterday when reached by telephone . Schacht, 55, joined the CFA Institute in 2004 after working as general counsel of ...
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