B-3
Switch Ports and Network Cables
Twisted-Pair Cable/Connector Pin-Outs
Switch Ports and Network
Cables
Other Wiring Rules:
■ All twisted-pair wires used for 10 Mbps, and 100 Mbps operation must be
twisted through the entire length of the cable. The wiring sequence must
conform to EIA/TIA 568-B (not USOC). See the Pin Assignment tables
below the cable illustrations later in this appendix for a listing of the
signals used on each pin.
■ For 10 Mbps connections to the ports, you can use 100-ohm differential
Category 3, 4, or 5 unshielded (UTP) or shielded (STP) twisted-pair cable,
as supported by the IEEE 802.3 10Base-T standard.
■ For 100 Mbps connections to the ports, use 100-ohm differential Category
5 UTP or STP cable only, as supported by the IEEE 802.3u 100Base-TX
standard.
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