HP J4897A, Installation Manual

Page: 42 / 60

B-4
Switch Ports and Network Cables
Twisted-Pair Cable/Connector Pin-Outs
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Straight-Through Twisted-Pair Cable for
10 Mbps or 100 Mbps Network Connections
Because of the Auto MDI/MDI-X operation of the RJ-45 ports on the switch,
when they are operating at either 10 Mbps or 100 Mbps, for all network
connections, you can use “straight-through” cables.
For this feature to operate correctly, the port on the connected device must
also be configured as
Auto
, not in any fixed configuration such as 100 Mbps/
full duplex.
Cable Diagram
N o t e
■
Pins 1 and 2 on connector “A” must be wired as a twisted pair to pins 1
and 2 on connector “B”.
■ Pins 3 and 6 on connector “A” must be wired as a twisted pair to pins 3
and 6 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
Straight-Through Cable
white/orange
orange/white
white/green
green/white
Connector “A” Connector “B”
Switch End (MDI-X) Computer, Transceiver, or
Other End
Signal Pins Pins Signal
r
receive -
tr
transmit - 1
2
3
6 1
2
3
6 tr
transmit -
r
receive -
z3.book Page 4 Friday, November 1, 2002 5:40 PM