B Cables And Connectors; Twisted-Pair Cable/Connector Pin-Outs - HP ProCurve 4000M Installation Manual

Cables and Connectors
This appendix includes minimum pin-out information and specifications for
cables that should be used with the switch modules for the Switch 4000M and
8000M.
N o t e
Incorrectly wired cabling is the most common cause of problems for LAN
communications. HP recommends that you work with a qualified LAN cable
installer for assistance with your cabling requirements.

Twisted-Pair Cable/Connector Pin-Outs

The RJ-45 ports on the 10/100Base-TX Switch Module are wired as MDI-X
ports. The type of twisted-pair cable you connect to these ports (either
"straight through" or "crossover") depends on the type of device at the other
end of the cable.
The rule is, when connecting same-type ports together (for example MDI-
X-to-MDI-X), use crossover cable; when connecting opposite-type ports
together (for example MDI-X-to-MDI), use straight-through cable.
These additional rules apply:
All twisted-pair wires used must be twisted through the entire length of
the cable. The wiring sequence must conform to EIA/TIA 568B or AT&T
258A (not USOC). See "Twisted-Pair Cable Pin Assignments" later in this
appendix for a listing of the signals used on each pin.
For connections to the 10 Mbps ports, you can use Category 3, 4, or 5
unshielded twisted-pair cable, as supported by the IEEE 802.3 Type
10Base-T standard.
For connections to the 100 Mbps ports, use 100-ohm Category 5 UTP or
STP cable only, as supported by the IEEE 802.3u Type 100Base-TX stan-
dard.
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