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Synchronous Digital Hierarchy

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ALSO CALLED: S D H, SDH
DEFINITION: SDH (Synchronous Digital Hierarchy) is a standard technology for synchronous data transmission on optical media. It is the international equivalent of Synchronous Optical Network. Both technologies provide faster and less expensive network interconnection than traditional PDH (Plesiochronous Digital Hierarchy) equipment. In digital telephone transmission, "synchronous" means the bits from one call  … 

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Synchronous Digital Hierarchy Reports
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Alcatel 1850 TSS-320: Transport Service Switch | Release 1
sponsored by Alcatel
DATA SHEET: The Alcatel 1850 TSS-320 is a new breed of multiservice transport platform that is able to support mixed traffic, from 100 percent circuits to 100 percent packets, up to a maximum of 320 Gb/s.
Posted: 07 Jul 2006 | Published: 01 Jul 2005

Alcatel
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