Cisco 7304 Installation Guide download pdf (Page 27)

3-3

Cisco 7304 Router Modular Services Card and Shared Port Adapter Hardware Installation Guide

OL-4681-01

Chapter 3 Overview: Cisco 7304 Router Shared Port Adapters

FastEthernet SPA Overview

Table 3-2 SPA-4FE-7304 LEDs

Cables, Connectors, and Pinouts

The interface connectors on the SPA-4FE-7304 are four individual RJ-45 receptacles. You can use all

four interface connectors simultaneously. Each connection supports IEEE 802.3 and Ethernet

10BASE-T interfaces compliant with appropriate standards. The RJ-45 connections require external

transceivers. Cisco Systems does not supply Category 5 unshielded twisted-pair (UTP) RJ-45 cables;

these cables are available commercially.

Figure 3-2 shows the RJ-45 connector. Table 3-3 lists the pinouts and signals for the RJ-45 connector.

Figure 3-2 RJ-45 Connections, Plug, and Receptacle

Note Referring to the RJ-45 pinout in Table 3-3, 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 port circuitry in the SPA-4FE-7304.

Depending on your RJ-45 interface cabling requirements, use the pinouts in Figure 3-3 and Figure 3-4.

LED Label Color State Meaning

STATUS Green On The SPA is online.

Yellow On The SPA is receiving power and bootstrapping.

Off Off The SPA is offline and deactivated.

Port Number

(0, 1, 2, or 3)

1. In this case, port number refers to the numbered LEDs on the SPA-4FE-7304 (0, 1, 2, or 3). Each LED number on the

FastEthernet SPA references a port on the SPA.

Green On The port is enabled and the link is up.

Yellow On The port is enabled and the link is down.

Off Off The port is disabled.

Table 3-3 RJ-45 Connector Pinout

Pin Description

1 Transmit data + (TxD+)

2TxD–

3 Receive data + (RxD+)

6RxD–

H2936

8 7 6 5 4 3 2 1

J-45 connector

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 83 84

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Cisco 7304 Installation Guide Page 27