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Download e-book for kindle: Access Networks: Technology and V5 Interfacing by Alex Gillespie

By Alex Gillespie

ISBN-10: 089006928X

ISBN-13: 9780890069288

Provides a view of present interfacing expertise, particularly V5, the worldwide interface ordinary. The textual content examines either the basics and complicated elements of community entry know-how, and the implication for the way forward for entry networks, as much as soliton transmission and quantum cryptology. The e-book is split into sections: technological concerns and interface matters. Separate chapters on complex copper, optical fibre, complicated optical and radio entry applied sciences, the powering of entry networks, ATM within the entry community and the supported providers are integrated.

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Additional info for Access Networks: Technology and V5 Interfacing

Example text

The reason for its use in some systems is the failure of the approach that was originally intended. This alternative approach is directional-division multiplexing (DDM), which is more accurately called directionaldivision duplexing (DDD). 2 Directional Coupling The DDD approach is based on the use of directional couplers that make use of technology similar to passive splitters. The bidirectional signals on an optical fiber can be separated into unidirectional signals on two fibers to which it is coupled provided that signal is lost into a fourth leg of the coupler.

It is absurd to consider using SDM, because this would mean that different fibers were used for different channels, which is not really multiplexing. DDM cannot be used either because it uses the direction of transmission to separate channels, while the channels to be separated are transmitted in the same direction. SDM and DDM are duplexing techniques and not true multiplexing techniques. Duplexing techniques that separate the channels using optical wavelengths, pseudorandom modulation of an electronic carrier (CDM), electronic spectra, and time intervals can be used for both duplexing and multiplexing.

And K. , pp. 29–34. , “An ISDN Echo-Cancelling Transceiver Chip Set for 2B1Q Coded UInterface,” IEEE J. Solid-State Circuits, Vol. 24, No. 6, December 1989, pp. 1598–1604. , and T. J. , Starr, “High Bit Rate Digital Subscriber Line: A Copper Bridge to the Network of the Future,” IEEE J. Selected Areas in Communications, Vol. 9, No. 6, August 1991, pp. 765–768. Waring, D. , “The Asymmetrical Digital Subscriber Line (ADSL): A New Transport Technology for Delivering Wideband Capabilities to the Residence,” GLOBECOM’91, Vol.

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Access Networks: Technology and V5 Interfacing by Alex Gillespie


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