From Optical Networking Best Practices Handbook

Today, many large enterprises find themselves attempting to meet what appear to be two diametrically opposed objectives. On the one hand, these enterprises are looking for ways to utilize IT as a competitive advantage, using it to enhance the flow of information and improve the access to applications across the entire enterprise, ultimately increasing employee productivity. On the other hand, enterprises must manage costs—in particular, the total cost of IT. The management teams at these large enterprises recognize that storage and server consolidation/centralization provides the most effective means to leverage and share their information assets so that employees can collaborate effectively and content can be delivered efficiently. Management also recognizes, however, that centralization of computing resources will not deliver the desired employee productivity improvements unless it is accompanied by a significant increase in bandwidth to insure that network users are able to quickly access these centralized resources. Of course, significantly increasing available bandwidth using traditional access solutions results in a dramatic increase in the total cost of IT, moving the enterprise further from its second objective of managing costs [1].

These same large enterprises frequently utilize an ATM, frame relay, or leased-line infrastructure to connect their metro sites. Enterprises are...

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Products & Services
Fiber Optic Cables
Fiber optic cables are composed of one or more transparent optical fibers enclosed in protective coverings and strength members. Fiber optic cables are used to transmit "light" data.
Wavelength Division Multiplexers (WDM)
Wavelength division multiplexers (WDM) are devices that combine light signals with different wavelengths, coming from different fibers, onto a single fiber. They include dense wavelength division multiplexers (DWDM), devices that use optical (analog) multiplexing techniques to increase the carrying capacity of fiber networks beyond levels that can be accomplished via time division multiplexing (TDM).
Packet Switching Chips
Packet switching chips are communication integrated circuits (ICs) used in packet-switched networks to rout packets between network nodes.
Network Simulation Software
Network simulation software is designed to model the potential behaviors of computer networks.
Network Clock Sources
Network clock sources are timing devices that use a signal from an atomic clock or other external reference source to set and maintain a central time for all of the elements in a network.

Topics of Interest

4.9.3 DWDM Metro Systems DWDM Metro systems consist of network nodes of a physical fiber ring topology (see Fig. 4.3). Connectivity between nodes is achieved via wavelengths (see Section 4.2) so that...

Information technology (IT) executives face a number of challenges as they attempt to deliver optical network services that provide clear competitive advantages for their enterprises. Many of these...

Gigabit Ethernet for Metro Area Networks discusses the public network evolution that is now under way in the United States, where many enterprises and carriers alike are modifying their approach to...

2.10 Ethernet Passive Optical Networks (EPONs) EPONs are an emerging access network technology that provide a low-cost method of deploying optical access lines between a carrier s CO and a customer...

Chapter List Chapter 9: Metro Ethernet Overview and Architecture Chapter 10: Ethernet Services over Metro Ethernet Networks Chapter 11: Ethernet Services over Public WAN Chapter 12: Ethernet...

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