Cisco 7304 Installation Guide download pdf (Page 40)

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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

T3/E3 Serial SPA Overview

For single-mode and multimode optical fiber connections, you can use either a duplex LC-type cable

(see Figure 3-13) or two simplex LC-type cables, one for transmit (TX) and one for receive (RX).

Use single-mode (for intermediate- or long-reach configurations) or multimode optical fiber cable to

connect your router to a network or to connect two 1-Port OC-12c/STM-4 POS SPA-equipped routers

back to back.

Long-range SFP optical transceiver modules (for long-reach configurations) cannot be connected

back-to-back without using an attenuator between the two of them.

Figure 3-13 LC-Type Cable

T3/E3 Serial SPA Overview

The following sections describe the 2-Port and 4-Port T3/E3 Serial SPA:

• 2-Port and 4-Port T3/E3 Serial SPA LEDs, page 3-16

• 2-Port and 4-Port T3/E3 Serial SPA Interface Specifications, page 3-17

• 2-Port and 4-Port T3/E3 Serial SPA Cables and Connectors, page 3-17

2-Port and 4-Port T3/E3 Serial SPA LEDs

The 2-Port and 4-Port T3/E3 Serial SPA has three types of LEDs. There are two LEDs for each port on

the SPA, and one STATUS LED. Figure 3-14 shows an example of these LEDs on a 4-Port T3/E3 Serial

SPA.

Figure 3-14 4-Port T3/E3 Serial SPA Faceplate

/ / / /

/ /

TXRX

4929

C/A

STATUS

SPA-4XT3/E3

A/L

C/A

A/L

C/A

A/L

C/A

A/L

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Cisco 7304 Installation Guide Page 40