Line-driver meaning

A device that extends the transmission distance between terminals and computers connected via private lines or networks. Also called a "short-haul modem" or "limited-distance modem," line drivers can extend a signal that is normally limited to a few dozen or a few hundred feet up to several miles. Line drivers are used to connect point-of-sale (POS) terminals, sensors, machine tools and myriad other digital devices to a host computer.
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A type of interface converter used to extend the distance of a digital connection by converting the digital signal to a low-voltage, low-impedance signal that can transmit more effectively and over longer distances on dedicated, specially conditioned twisted-pair circuits.The RS-232 specification (more correctly known as EIA-232), for example, generally limits the distance between devices to 50 feet at transmission rates of 56 kbps. At lower speeds, line drivers can reshape the digital pulses to extend that distance considerably.At speeds of up to 9.6 kbps, for example, line drivers can extend that limitation to 500
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