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B-9
Switch Ports and Network Cables
Twisted-Pair Cable/Connector Pin-Outs
Switch Ports and Network
Cables
Crossover Twisted-Pair Cable for
10 Mbps or 100 Mbps Network Connection
The HP Auto-MDIX operation of the 10/100 ports on the switches also allows
you to use crossover cables for all network connections, to PCs, servers or
other end nodes, or to hubs or other switches.
If any of these ports are given a fixed configuration, for example 100 Mbps/
Full Duplex, the ports operate as MDI-X ports, and crossover cables must be
then used for connections to hubs or switches or other MDI-X network
devices.
Cable Diagram
Figure B-3. Cross-over Cable Diagram for 10/100 Mbps Network Connection
Note Pins 1 and 2 on connector “A” must be wired as a twisted pair to pins 3 and 6
on connector “B”.
Pins 3 and 6 on connector “A” must be wired as a twisted pair to pins 1 and 2
on connector “B”.
Pins 4, 5, 7, and 8 are not used in this application, although they may be wired
in the cable.
.
Pin Assignments
Switch End (MDI-X) Hub or Switch Port, or Other MDI-X Port End
Signal Pins Pins Signal
receive +
receive -
transmit +
transmit -
1
2
3
6
6
3
2
1
transmit -
transmit +
receive -
receive +