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Definition of "telephone line" |
A telephone line or telephone circuit or just line or circuit within the industry is a single-user circuit on a telephone communication system. / Private Branch Exchange is a telephone system within an enterprise that switches calls between enterprise users on local lines while allowing all users to share a certain number of external phone lines. The main purpose of a PBX is to save the cost of requiring a line for each user to the telephone company's central office. / wires existing between subscribers and central stations in a telephone system. |
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