Cisco Systems PA-FE-FX manual PA-FE-TX RJ-45 Connections-Plug and Receptacle

Receptacles, Cables, and Pinouts

Figure 1-8 shows the RJ-45 cable connectors. Cisco Systems does not supply Category 5 UTP RJ-45 cables; these cables are available commercially. Table 1-1 lists the pinouts and signals for the PA-FE-TX RJ-45 connectors.

Figure 1-8 PA-FE-TX RJ-45 Connections—Plug and Receptacle

87654321

RJ-45 connector

H2936

Warning The ports labeled “Ethernet,” “10BaseT,” “Token Ring,” “Console,” and “AUX” are

safety extra-low voltage (SELV) circuits. SELV circuits should only be connected to other SELV circuits. Because the BRI circuits are treated like telephone-network voltage, avoid connecting the SELV circuit to the telephone network voltage (TNV) circuits.

Table 1-1	PA-FE-TX RJ-45 Connector Pinout
Pin	Description
1	Receive Data + (RxD+)
2	RxD–
3	Transmit Data + (TxD+)
6	TxD–

Note Referring to the RJ-45 pinout in Table 1-1, proper common-mode line terminations should be used for the unused Category 5, UTP cable pairs 4/5 and 7/8. Common-mode termination reduces the contributions to electromagnetic interference (EMI) and susceptibility to common-mode sources. Wire pairs 4/5 and 7/8 are actively terminated in the RJ-45, 100BaseTX port circuitry in the PA-FE-TX.

Depending on your RJ-45 interface cabling requirements, use the pinouts in Figure 1-9 and Figure 1-10.

Figure 1-9 Straight-Through Cable Pinout—PA-FE-TX RJ-45 Connection to a Hub or Repeater

FEIP

3TxD+

6TxD–

1RxD+

2RxD–

Hub or repeater

3RxD+

6RxD–

1 TxD+	H3137
2 TxD–

1-6PA-FE-TX and PA-FE-FX Fast Ethernet 100BaseT Port Adapter Installation and Configuration