B-1
Appendix B: Cables
Twisted-Pair Cable and Pin Assignments
For 10/100BASE-TX and 1000BASE-T connections, the twisted-pair cable must
have four pairs of wires. Each wire pair is identified by two different colors. For
example, one wire might be green and the other, green with white stripes. Also, an
RJ-45 connector must be attached to both ends of the cable.
Caution: Each wire pair must be attached to the RJ-45 connectors in a specific
orientation.
Caution: DO NOT plug a phone jack connector into any RJ-45 port. Use only
twisted-pair cables with RJ-45 connectors that conform with FCC standards.
The Figure B-1 illustrates how the pins on the RJ-45 connector are numbered. Be
sure to hold the connectors in the same orientation when attaching the wires to the
pins.
Figure B-1 RJ-45 Connector Pin Numbers
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