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A private communications channel leased from a common carrier. It can be ordered in pairs, providing a four-wire channel for full-duplex transmission (dial-up system provides only two-wire lines). To improve line quality, it canalso be conditioned. (Freedman, 2001, p.220) Two types of Leased Lines are usually offered, Analogue Leased Lines and Digital Leased Lines. Digital Leased Lines offering is more flexible than Analogue Leased Lines in terms of bandwidth, and reaches much higher bandwidth than Analogue Leased Lines.
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