User's Manual

Table Of Contents

Foundry IronPoint 200 Installation Guide

Twisted-Pair Cable and Pin Assignments

Caution: 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.

For 100BASE-TX/10BASE-T 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.

Caution: Each wire pair must be attached to the RJ-45 connectors in a specific orientation.

Figure B-1 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 B-1. RJ-45 Connector Pin Numbers

100BASE-TX/10BASE-T 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).

The RJ-45 port on the access point is wired with MDI pinouts. This means that you must use

crossover cables for connections to PCs or servers, and straight-through cable for connections to

switches or hubs. However, when connecting to devices that support automatic MDI/MDI-X pinout

configuration, you can use either straight-through or crossover cable.

Straight-Through Wiring

Because the 10/100 Mbps port on the access point uses an MDI pin configuration, you must use

“straight-through” cable for network connections to hubs or switches that only have MDI-X ports.

However, if the device to which you are connecting supports auto-MDIX operation, you can use

either “straight-through” or “crossover” cable.

Pin MDI-X Signal Name MDI Signal Name

1 Receive Data plus (RD+) Transmit Data plus (TD+)

2 Receive Data minus (RD-) Transmit Data minus (TD-)

3 Transmit Data plus (TD+) Receive Data plus (RD+)

6 Transmit Data minus (TD-) Receive Data minus (RD-)

4, 5, 7, 8 Not used Not used

Note: The “+” and “-” signs represent the polarity of the wires that make up each wire pair.