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A wire signal is a brevity code used by telegraphers to save time and cost when sending long messages. The best-known code was the 92 Code adopted by Western Union in 1859. The code was designed to reduce bandwidth consumption over telegraph lines, thus speeding transmissions by utilizing a numerical code system for frequently used phrases.
Users can now switch carriers and keep their cell phone numbers, including prefix. An additional digit has been added to the code of every carrier. Making a single code per carrier, after each carrier had to have multiple codes. And making the NSN 10 digits after it was 9.
Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. The prefixes enable international direct dialing (IDD). Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a country or world region other than the caller's.
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Western Union Telegraph Building, lithograph. The Western Union Company is an American multinational financial services corporation headquartered in Denver, Colorado.. Founded in 1851 as the New York and Mississippi Valley Printing Telegraph Company in Rochester, New York, [3] the company changed its name to the Western Union Telegraph Company in 1856 after merging with several other telegraph ...
Most area codes of the form N10, originally reserved for AT&T's Teletypewriter eXchange (TWX) service, were transferred to Western Union in 1969 and were freed for other use in 1981 after conversion to Telex II service was complete. The last of these, 610, was assigned to Canada, but reassigned in 1992. These new area codes, as well as a few ...
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