Site home page
(news and notices)

Get alerts when Linktionary is updated

Book updates and addendums

Get info about the Encyclopedia of Networking and Telecommunicatons, 3rd edition (2001)

Download the electronic version of the Encyclopedia of Networking, 2nd edition (1996). It's free!

Contribute to this site

Electronic licensing info



SDH (Synchronous Digital Hierarchy)

Related Entries    Web Links    New/Updated Information

Search Linktionary (powered by FreeFind)

Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.

SDH is the ITU standard for a synchronous optical network that supports multiple gigabit-per-second transmission speeds over fiber-optic cable. Long-distance and regional telecommunication companies outside of North America implement SDH on their fiber-optic trunk lines. SONET, which is basically a subset of SDH, is used in the United States. Refer to "SONET (Synchronous Optical Network)" for more information.

Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.
All rights reserved under Pan American and International copyright conventions.