By Stamatios V. Kartalopoulos
''Optical communications and fiber expertise are speedy changing into key suggestions for the expanding bandwidth calls for of the twenty first century. This introductory textual content presents working towards engineers, managers, and scholars with an invaluable advisor to the newest advancements and destiny tendencies of 3 significant applied sciences: SONET, SDH, and ATM, and a short advent to legacy TDM communications systems.
There are transparent causes of:
* How ATM is mapped onto SONET/SDH
* The function of IP networking with ATM
* Dense wavelength department multiplexing (DWDM)
* the long run course of convergence of communications.
This concise e-book beneficial properties easy-to-follow illustrations, overview questions, labored examples, and beneficial references. An accompanying CD-ROM offers the major figures in complete colour, appropriate for simple cut-and-paste displays. realizing SONET/SDH AND ATM is a must-read for conversation execs who are looking to increase their wisdom of this rising technology.''
IEEE Communications Society
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''Optical communications and fiber know-how are quickly turning into key ideas for the expanding bandwidth calls for of the twenty first century. This introductory textual content presents working towards engineers, managers, and scholars with an invaluable consultant to the newest advancements and destiny traits of 3 significant applied sciences: SONET, SDH, and ATM, and a short creation to legacy TDM communications platforms.
Additional info for Understanding Sonet/Sdh and Atm: Communications Networks for the Next Millennium
Different rays traveling in different angles), the rays enter the second fiber at different angles and thus are refracted differently. Consequently, one mode may change into another mode. This behavior, known as mode mixing, occurs only in multimode fibers. Mode mixing affects the actual transmitted bandwidth (BWact ) over the length (L) of a multimode fiber. 11 = BWact 'Y --V' = 07 . 0. REDUCTION OF MODAL DISPERSION The difference in travel time is improved if a graded-index fiber is used. For a graded index of refraction profile n(r), dispersion is improved if the condition holds: Rb:5~ ngL~2' where n g is the group refractive index, ~ is the maximum relative index between core and cladding, and vg is the group velocity in the medium.
Nellist, Understanding Telecommunications and Lightwave Systems, IEEE Press, Piscataway, NJ, 1996.  J. Hecht, Understanding Fiber Optics, Prentice Hall, Upper Saddle River, NJ, 1999. V. Kartalopoulos, Understanding Neural Networks and Fuzzy Logic: Basic Concepts and Applications, IEEE Press, Piscataway, NJ, 1996. R. Freer, Computer Communications and Networks, IEEE Press, Piscataway, NJ, 1996. B. Carne, Telecommunications Primer, Prentice Hall, Upper Saddle River, NJ, 1995.  A. , Masson, Paris, 1965.
Such matter, termed optically transparent matter, allows light to propagate through it and emerge from it. Examples of optically transparent matter include water and clear glass. We are more interested in optically transparent matter; thus, we examine the interaction of light with it. 1 Reflection and Refraction: Index of Refraction The index of refraction of a transparent medium (nrned) is defined as the ratio of the speed of light in vacuum (c) to the speed of light in a medium (Vrned)' nrned = C Vrned Chapter 2 13 Interaction of Light with Matter Then, between two media (l and 2) the relationship is true (Figure 2.
Understanding Sonet/Sdh and Atm: Communications Networks for the Next Millennium by Stamatios V. Kartalopoulos