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ABLES

B-2

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 red and the other,

red 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. (See “Cabling Guidelines” on

page 4-1 for an explanation.)

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

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 75 76

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SMC Networks SMC6724L2 Manuale Utente Pagina 50