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C
C
ABLES
AND
P
INOUTS
T
WISTED
-P
AIR
C
ABLE
A
SSIGNMENTS
For 10/100BASE-TX connections, a twisted-pair cable must have two pairs
of wires. Each wire pair is identified by two different colors. For example,
one wire might be green and the other, green with white stripes. Also, an
RJ-45 connector must be attached to both ends of the cable.
C
AUTION
:
Each wire pair must be attached to the RJ-45 connectors in a
specific orientation. (See
“Straight-Through Wiring” on page 49
and
for an explanation.)
C
AUTION
:
DO NOT plug a phone jack connector into the RJ-45 port. Use
only twisted-pair cables with RJ-45 connectors that conform with FCC
standards.
The following figure 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.
Figure 30: RJ-45 Connector
10/100BASE-TX P
IN
A
SSIGNMENTS
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for
RJ-45 connections: 100-ohm Category 3 or better cable for 10 Mbps
connections, or 100-ohm Category 5 or better cable for 100 Mbps
connections. Also be sure that the length of any twisted-pair connection
does not exceed 100 meters (328 feet).
The RJ-45 ports on the unit supports automatic MDI/MDI-X operation, so
you can use straight-through or crossover cables for all network
connections to PCs, switches, or hubs. In straight-through cable, pins 1, 2,
3, and 6, at one end of the cable, are connected straight through to pins 1,
2, 3, and 6 at the other end of the cable.
1
8
8
1
