Cisco Self-Study: Building Cisco Metro Optical Networks (METRO)

Chapter 8. Implementing DWDM in Metropolitan-Area Networks

This chapter covers the following topics:

• Challenges in the metro-area network

• Multiplexing optical signals

• Dense wavelength division multiplexing fundamentals

• DWDM components

• Optical impairments in DWDM systems

• Cisco DWDM equipment

• Building a DWDM infrastructure

Today's explosion in data traffic, fueled in large part by the growth of the Internet, has caused rapid depletion of available fiber bandwidth in the metropolitan area. As a result, service providers have reacted by increasing capacity in their long-haul and core networks. The bandwidth bottleneck is now that of the metropolitan-area networks (MANs), where capacity has not increased as greatly as the long-haul networks. Keeping pace with ...