User's Manual

Cables and Pinouts 5 – 1
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5
Cables and Pinouts
This chapter describes the wiring and pin assignments for the cables and connectors that can be
used with the MP-622.
Twisted-Pair Cable Assignments
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.
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 5–1. Pin Numbering on RJ-45 Connector
10/100BASE-TX Pin Assignments
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).
W arning!
Each wire pair must be attached to the RJ-45 connectors in a specific orientation.
W arning!
Never plug a phone jack connector into a power injector RJ-45 port. Use only
twisted-pair cables with RJ-45 connectors that conform with FCC standards.
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