Crosstalk reduction in unshielded twisted-pair lines

Details Crosstalk reduction in unshielded twisted-pair lines Crosstalk reduction in unshielded twisted-pair lines

H - Electricity

04

B

340/72

H04B 3/32 (2006.01) H04L 12/44 (2006.01)

Patent

CA 1321416

ABSTRACT OF THE DISCLOSURE A method of reducing crosstalk in unshielded twisted pair (TP) lines interconnecting transceiver Hub and Pod elements of an IEEE 802.3 network is disclosed. Each element is connected by a four-wire full-duplex pair of unshielded TP wires which are prone to crosstalk noise induced by proximity to other TP wires. The crosstalk noise is reduced by (i) the collision protocol, and (ii) employing different drive levels in the Hub and the Pod. By having the Pod transmit at a higher voltage level then the Hub, the signal-to-crosstalk noise ratio at the Hub is optimized, allowing for highly reliable communications at up to 10 million bits per second. A collision protocol specified by the IEEE 802.3 standard further reduces crosstalk noise at the Hub.

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