2.2. Twisted Pair Cable Channel Model
2.2.1. Wiring Topology
In an office environment, twisted pair cables are wired from each desk to a central location, usually a dedicated wiring closet, where an Ethernet hub is used to connect every incoming cable at the center of a star. This is often called a star wiring configuration. Under this star wiring configuration, a straight twisted cable is used between a port of the hub and a computer NIC. With ideal terminations at both ends of a twisted pair cable, the transfer function of the twisted pair–based transmission channel can be estimated accurately using its propagation constant (Equation 2.8 or 2.9) for an identified distance. The star wiring configuration can also be found in some residences, ...
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