Twisted Pair Cables
TP cable is used for Base-T applications be-
cause of its excellent noise cancelling capabilities. Two pairs of twisted
pair wire are the minimum required for each computer that hooks to
the hub or switch :
●
One pair of TP wire to transmit data to the hub.
●
One pair of TP wire to receive data from the hub.
Some 100 Base-T devices (called "T4") require 4 pairs of wires as
does all 1000 Base-T devices. These standards require 2 pairs for
transmitting data and 2 pairs for receiving data.
To make a proper cable, first choose a twisted pair cable that is
adequate for your application. For instance, CAT 5E cable for 100MB
and 1000MB applications. Use solid core wire when pulling inside a
wall. Use stranded cable ("patch cable") for jumpers.
●
Remove the outer jacket of the twisted pair cable exposing
about a 6" of wire on each end of the cable.
●
Each pair of wire must be twisted together (after crimping, the
wire should be twisted right up to the connector).
●
Do not make the number one wiring mistake: "Split pairs" (a wire
from one pair is swapped with a wire from another pair).
●
To minimize mistakes, use a standard color code throughout
your project. See the prior pages for the correct connector pin
numbers associated with each Base-T pair and the most popular
color code.
●
Use good quality wire, connectors and tools
.
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