Foundry Networks IRONPOINT 250 - Manual (Page 45)

August 2007 © 2007 Foundry Networks, Inc. B-1
Appendix B
Cables
Specifications
Twisted-Pair Cable and Pin Assignments
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.
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,
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.
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
Cable Types and Specifications
Cable Type Max. Length Connector
10BASE-T Cat. 3 or better 100-ohm UTP 100 m (328 ft) RJ-45
100BASE-TX Cat. 5 or better 100-ohm UTP 100 m (328 ft) RJ-45
1
8
8
1