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C
ABLES
Twisted-Pair Cable and Pin Assignments
Caution:
The RJ-45 ports on the switch support 1000, 100 and 10 Mbps
Ethernet operation, with auto-negotiation of flow control.
Caution:
The figure below 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.
1000BASE-T Pin Assignments
1000BASE-T ports support automatic MDI/MDI-X operation, so
you can use straight-through cables for all network connections to
PCs or servers, or to other switches or hubs. In straight-through
cable, pins 1-8, at one end of the cable, are connected straight through
to pins 1-8 at the other end of the cable.
Use 100-ohm Category 5 or 5e unshielded twisted-pair (UTP) or
shielded twisted-pair (STP) cable for 1000BASE-T connections. Also
be sure that the length of any twisted-pair connection does not exceed
100 meters (328 feet).
The table below shows the 1000BASE-T MDI and MDI-X port
pinouts. These ports require that all four pairs of wires be connected.
B-2
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.
Each wire pair must be attached to the RJ-45 connectors
in a specific orientation.
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