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Category 4 cable

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This is an old revision of this page, as edited by 71.250.37.22 (talk) at 00:36, 25 August 2006 (layout edits). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Category 4 is a description of network cabling that consists of four unshielded twisted-pair (UTP) wires with a data rate of 16 Mbit/s and provided performance of up to 20 MHz. It was used in token ring networks, 10BASE-T, 100BASE-T4, and is no longer common or used in new installations. It was quickly superceded by Category 5/5e cable, both of which have 100±15 ohm impedance.

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