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Definition of "LEC" |
Local exchange carrier is the term for a public telephone company in the U.S. that provides local service. Some of the largest LECs are the Bell operating companies which were grouped into holding companies known collectively as the regional Bell operating companies when the Bell System was broken up by a 1983 consent decree. / A logic gate is an elementary building block of a digital circuit. Most logic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions low or high, represented by different voltage levels. The logic state of a terminal can, and generally does, change often, as the circuit processes data. In most logic gates, the low state is approximately zero volts, while the high state is approximately five volts positive. |
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