Standards  >   Network Protocols  >  

Synchronous Digital Hierarchy

RSS Feed    Add to Google    Add to My Yahoo!
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  … 
Definition continues below.
Synchronous Digital HierarchyReports
1 Match
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
1 Match
 
SYNCHRONOUS DIGITAL HIERARCHY DEFINITION (continued): … 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 are carried within one transmission frame. "Plesiochronous" means "almost (but not) synchronous," or a call that must be extracted from more than one transmission frame.SDH uses the following Synchronous Transport Modules (STM) and rates: STM-1 (155 megabits per second), STM-4 (622 Mbps), STM-16 (2.5 gigabits per second), and STM-64 (10 Gbps).
Synchronous Digital Hierarchy definition sponsored by SearchNetworking.com, powered by WhatIs.com an online computer dictionary

About TechTarget:

TechTarget provides enterprise IT professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective IT purchase decisions and managing their organizations' IT projects - with its network of technology-specific Web sites, events and magazines

All Rights Reserved, Copyright 2000 - 2014, TechTarget | Read our Privacy Statement