Foundry IronPoint 250 Installation Guide

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 supports automatic MDI/MDI-X operation, so you can use straight-through or crossover cables for all network connections to PCs, switches, or hubs.

Pin

MDI Signal Name

MDI-X Signal Name

 

 

 

1

Receive Data plus (RD+)

Transmit Data plus (TD+)

 

and GND (Positive Vport)

and -48V feeding power (Negative Vport)

 

 

 

2

Receive Data minus (RD-)

Transmit Data minus (TD-)

 

and GND (Positive Vport)

and -48V feeding power (Negative Vport)

 

 

 

3

Transmit Data minus (TD+)

Receive Data plus (RD+)

 

and -48V feeding power (Negative Vport)

and GND (Positive Vport)

 

 

 

4

GND (Positive Vport)

-48V feeding power (Negative Vport)

 

 

 

5

GND (Positive Vport)

-48V feeding power (Negative Vport)

 

 

 

6

Transmit Data minus (TD-)

Receive Data minus (RD-)

 

and -48V feeding power (Negative Vport)

and GND (Positive Vport)

 

 

 

7

-48V feeding power (Negative Vport)

GND (Positive Vport

 

 

 

8

-48V feeding power (Negative Vport)

GND (Positive Vport

 

 

 

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

Straight-Through Wiring

Because the 10/100 Mbps port on the access point uses automatic MDI/MDI-X pin configuration, you can use “straight-through” or “crossover” cable for network connections to PCs, hubs or switches.

Figure B-2. Straight-Through Wiring

EIA/TIA 568B RJ-45 Wiring Standard

10/100BASE-TX Straight-through Cable

White/Orange Stripe

 

 

Orange

 

 

 

1

White/Green Stripe

1

 

End A

2

Blue

2

End B

 

3

3

 

 

4

 

4

 

 

5

White/Blue Stripe

5

 

 

6

Green

6

 

 

7

7

 

 

 

 

 

8

White/Brown Stripe

8

 

 

 

 

 

Brown

Crossover Wiring

Because the 10/100 Mbps port on the access point uses automatic MDI/MDI-X pin configuration, you can use “straight-through” or “crossover” cable for network connections to PCs, hubs or switches.

B-2

© 2007 Foundry Networks, Inc.

August 2007

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Foundry Networks 250 manual 100BASE-TX/10BASE-T Pin Assignments, Straight-Through Wiring, Crossover Wiring

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