Specifications

20 Rapier Series Switch

C613-03020-00 REV J

Switch RJ-45 Ports

Caution. Do not plug a phone jack into any RJ-45 port. Doing so could damage

the switch. Use only twisted pair cables with RJ-45 connectors.

For 10BASE-T/100BASE-TX connections, a twisted pair cable must be used.

Each pair is identified by two different colours. For example, one wire might be

red, and the other red with a white stripe. An RJ-45 connector must be fitted to

both ends of the cable. Figure 17 illustrates the pin layout for RJ-45 connectors.

Figure 17: RJ-45 Pin layout

With 10BASE-T/100BASE-TX cables, pins 1 and 2 are used for transmitting

data, while pins 3 and 6 are used for receiving data. Table 4 lists the RJ-45 Pin

assignments.

1. The “+” and “-” signs represent the polarity of the wires that make up each

wire pair.

If a twisted pair cable is to join two ports and only one of the ports has an

internal crossover, the two pairs must be straight through, as listed in Table 5.

Table 4: RJ-45 Pin assignments

Pin Number Assignment

1TX+

2TX-

3RX+

6RX-

Table 5: RJ-45 Pin assignments, straight through cable

End 1 End 2

1 (TX+) 1 (TX+)

2 (TX-) 2 (TX-)

3 (RX+) 3 (RX+)

6 (RX-) 6 (RX-)

RJPIN