Black Box TS029A-R4 Manual page 20

AT&T 258A (EIA/TIA 568B) Signal Definition in Diagram Form
PIN #
Pair 2
1
2
Pair 3
3
Transmit Data
6
Pair 1
4
5
Pair 4
7
8
Mixing Telephones and Data: Some installations mix Base-T
networks on the same wires that are used in a telephone system.
They are subject to the same types of problems that telephone
systems have, ranging in difficulty from the typical errors in wiring
and connectors to intermittent connections. Care must be taken to
avoid electrical connection between networks and telephone
POLARITY FUNCTION
(+) Transmit Data
(-) Receive Data
(+)
(-) Receive Data
(-) Receive Data
(+) Transmit Data
(+) Transmit Data
(-) Receive Data
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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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