Cisco 7304 Installation Guide download pdf (Page 37)

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

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Chapter 3 Overview: Cisco 7304 Router Shared Port Adapters

OC-12 POS SPA Overview

The SFP optical transceiver modules used with the 2-Port and 4-Port OC-3c/STM-1 POS SPA provide

the following optical fiber options:

• Multimode—155-Mbps, OC-3c/STM-1 optical fiber (SONET STS-3c or SDH STM-1)

Use a multimode optical fiber that has a core/cladding diameter of 62.5/125 microns.

• Single-mode—155-Mbps, OC-3c/STM-1 optical fiber (SONET STS-3c or SDH STM-1)

Use a single-mode optical fiber that has a modal-field diameter of 8.7 ± 0.5 microns. (Nominal

diameter is approximately 10/125 microns.)

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

(see Figure 3-10) 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 OC-3c/STM-1-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 3-10 LC-Type Cable

OC-12 POS SPA Overview

The 1-Port OC-12c/STM-4 POS SPA is single-height SPA that installs into one MSC subslot. The 1-Port

OC-12c/STM-4 POS SPA with a small form-factor pluggable (SFP) optical transceiver module provides

SONET and SDH network connectivity with a bandwidth of 622.08 Mbps.

For more information about SPA bandwidth, see the “Bandwidth Oversubscription” topic in this chapter.

For more information about SPAs and their compatibility with MSCs and modular optics, see the “MSC

and SPA Product Overview” chapter in this guide.

The following sections describe the 1-Port OC-12c/STM-4 POS SPA:

• 1-Port OC-12c/STM-4 POS SPA LEDs, page 3-14

• 1-Port OC-12c/STM-4 POS SPA Interface Specifications, page 3-14

• 1-Port OC-12c/STM-4 POS SPA SFP Optical Transceiver Modules and Cables, page 3-15

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Cisco 7304 Installation Guide Page 37