Chapter 1 Overview

Network Configuration Examples

Figure 1-11 Catalyst 3750-E Switches in a MAN Configuration

Cisco 12000 Gigabit switch routers

Catalyst 6500 switches Si

Catalyst 3750 StackWise switch stack

Catalyst 3750-E switches

Set-top box

TV

Service

Provider

POP

Si

Mini-POP

Gigabit MAN

Residential location

Residential gateway (hub)

 

Set-top box

PC

200863

 

 

TV

Long-Distance, High-Bandwidth Transport Configuration

Figure 1-12shows a configuration for sending 8 Gigabits of data over a single fiber-optic cable. The Catalyst 3750-E or 3560-E switches have coarse wavelength-division multiplexing (CWDM) fiber-optic SFP modules installed. Depending on the CWDM SFP module, data is sent at wavelengths from 1470 to 1610 nm. The higher the wavelength, the farther the transmission can travel. A common wavelength used for long-distance transmissions is 1550 nm.

The CWDM SFP modules connect to CWDM optical add/drop multiplexer (OADM) modules over distances of up to 393,701 feet (74.5 miles or 120 km). The CWDM OADM modules combine (or multiplex) the different CWDM wavelengths, allowing them to travel simultaneously on the same fiber-optic cable. The CWDM OADM modules on the receiving end separate (or demultiplex) the different wavelengths.

For more information about the CWDM SFP modules and CWDM OADM modules, see the Cisco CWDM GBIC and CWDM SFP Installation Note.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

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Cisco Systems 3750E Long-Distance, High-Bandwidth Transport Configuration, Catalyst 3750-E Switches in a MAN Configuration