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C
ABLES
Twisted-Pair Cable and Pin Assignments
Caution:
For 100BASE-TX/10BASE-T connections, a twisted-pair cable must have
two pairs of wires. Each wire pair is identified by two different colors. For
example, one wire might be green and the other, white with green stripes.
Also, an RJ-45 connector must be attached to both ends of the cable.
Caution:
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.
10BASE-T/100BASE-TX Pin Assignments
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for
RJ-45 connections: 100-ohm Category 3, 4 or 5 cable for 10 Mbps
connections or 100-ohm Category 5 cable for 100 Mbps connections. Also
be sure that the length of any twisted-pair connection does not exceed 100
meters (328 feet).
B-2
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.
Each wire pair must be attached to the RJ-45 connectors in a
specific orientation. (See "Cabling Guidelines" on page 4-1 for
an explanation.)
1
Figure B-1. RJ-45 Connector Pin Numbers
8
8
1
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