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34 VIP-FE-TX Installation and Conﬁguration

FE-TX Port Adapter Functions

Table 3 FE-TX RJ-45 Connector Pinout

Note Referring to the RJ-45 pinout in Table 3, 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, 100BASE-TX port circuitry in

the FE-TX port adapter.

Depending on your RJ-45 interface cabling requirements, use the pinouts in Figure 18 and

Figure 19.

Figure 18 Straight-Through Cable Pinout, FE-TX RJ-45 Connection to a Hub or Repeater

Figure 19 Crossover Cable Pinout, FE-TX RJ-45 Connections Between Hubs and Repeaters

Depending on the type of media you use between the MII connection on the port adapter and your

switch or hub, the network side of your 100BASE-T transceiver should be appropriately equipped

with ST-type connectors (for optical ﬁber), BNC connectors, and so forth. Figure 20 shows the pin

orientation of the female MII connector on the port adapter. The port adapters are ﬁeld-replacable

units (FRUs).

Pin Description

1 Receive Data + (RxD+)

2 RxD–

3 Transmit Data + (TxD+)

6 TxD–

Hub or repeaterFEIP

3 TxD+

6 TxD–

1 RxD+

2 RxD–

3 RxD+

6 RxD–

1 TxD+

2 TxD–

H3137

Hub or repeater

3 TxD+

6 TxD–

1 RxD+

2 RxD–

3 TxD+

6 TxD–

1 RxD+

2 RxD–

H3138

Hub or repeater

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 43 44

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