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| Dec 2, 2009 |
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Standards >
Network Protocols >
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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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Definition continues below.
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Synchronous Digital Hierarchy White Papers
(View All Report Types)
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2 Matches
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Reference Guide: Fundamental Protocols of Network Management
sponsored by SolarWinds, Inc.
WHITE PAPER:
The goal of this five-part Reference Guide is to assist you with understanding and successfully employing the top 5 network management protocols. Building upon the very simplest in Internet Control Message Protocol (ICMP) and Simple Network Management Protocol (SNMP), this guide explores the latest network management solutions.
Posted: 20 Oct 2009 | Published: 20 Oct 2009
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Router Essentials
sponsored by Global Knowledge
WHITE PAPER:
Build a basic foundation of knowledge about routers, the devices that allow you to move packets between networks, by reading this white paper.
Posted: 10 Dec 2008 | Published: 10 Dec 2008
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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
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