Cisco 7304 Installation Guide download pdf (Page 34)

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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

OC-3 POS SPA Overview

Note The 1000BASE-ZX SFP modules provide an optical power budget of 21.5 dB. You should measure your

cable plant with an optical loss test set to verify that the optical loss of the cable plant (including

connectors and splices) is less than or equal to 21.5 dB. The optical loss measurement must be performed

with a 1550-nm light source.

CWDM SFPs

CWDM SFPs were first supported on the SPA-2GE-7304 in Cisco IOS Release 12.2(28)SB. CWDM

SFPs for the SPA-2GE-7304 come in eight wavelengths that range from 1470 nm to 1610 nm. Color

markings on the devices identify the wavelength to which the Gigabit Ethernet channel is mapped.

Table 3-10 lists the CWDM SFPs with their wavelengths and color codes that are supported on the

SPA-2GE-7304.

Table 3-10 CWDM SFP Wavelengths and Color Coding

For more detailed information on these CWDM SFP modules, see the Cisco CWDM GBIC and SFP

Solution Data Sheet.

OC-3 POS SPA Overview

The 2-Port and 4-Port OC-3c/STM-1 POS SPA is a single-height SPA that installs into one MSC

subslot. The OC-3c/STM-1 POS SPA with small form-factor pluggable (SFP) optical transceiver

modules provides SONET and SDH network connectivity with a per-port bandwidth of 155.52 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.

2. A mode-conditioning patch cord is required.

When using the SFP-FCGE-L with 62.5-micron diameter MMF, you must install a mode-conditioning patch cord between the

SFP module and the MMF cable on both the transmit and the receive ends of the link when link distances are greater than 984 ft

(300 m).

We do not recommend using the SFP-FCGE-L and MMF with no patch cord for very short link distance (tens of meters). The

result could be an elevated bit error rate (BER).

3. Dispersion-shifted single-mode fiber-optic cable.

SFP Product Number Wavelength Color Identifier

CWDM-SFP-1470= Longwave 1470 nm laser, single mode Gray

CWDM-SFP-1490= Longwave 1490 nm laser, single mode Violet

CWDM-SFP-1510= Longwave 1510 nm laser, single mode Blue

CWDM-SFP-1530= Longwave 1530 nm laser, single mode Green

CWDM-SFP-1550= Longwave 1550 nm laser, single mode Yellow

CWDM-SFP-1570= Longwave 1570 nm laser, single mode Orange

CWDM-SFP-1590= Longwave 1590 nm laser, single mode Red

CWDM-SFP-1610= Longwave 1610 nm laser, single mode Brown

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Cisco 7304 Installation Guide Page 34