Synchronous Optical Network (SONET)

Synchronous Optical Network (SONET)

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Exchange Carriers Standards Association (ECSA) developed synchronous optical network (SONET) for ANSI. Synchronous digital hierarchy (SDH) is the international equivalent of SONET. These standards define the optical telecommunication transport for the U.S. and European Telecommunications. The SONET and SDH are technologies for network transport. They use synchronous operations in facilitating real-time data, voice, and video transmission through fiber optic cabling. The rates range from 51.84 Mbps (OC-1 or optical carrier level 1) to 13.271 Gbps (OC-255). High-speed communications from different vendors are interconnected by applying the SONET standard. The ability of SONET to transport many different digital signals using a standard synchronous transport signal (STS) format is its major attribute. We will discuss the SONET and SDH in this chapter. The SONET signal, frame, components, topologies, and standards will also be discussed.

Chapter Contents:

  • 6.1 SONET Signal
  • 6.1.1 SONET Signal Rates
  • 6.2 SONET Frame
  • 6.3 SONET Components
  • 6.3.1 Line Overhead (LOH)
  • 6.3.2 Section Overhead (SOH)
  • 6.3.3 Transport Overhead (TOH)
  • 6.3.4 Path Overhead (POH)
  • 6.4 SONET Topologies
  • 6.4.1 SONET Point-to-Point Topology
  • 6.4.2 SONET Point-to-Multipoint Topology
  • 6.4.3 SONET Hub and Spoke Topology
  • 6.4.4 SONET Ring Topology
  • 6.5 Advantages and Disadvantages of SONET
  • 6.6 Synchronous Digital Hierarchy
  • 6.6.1 SDH Virtual Container
  • 6.6.2 SONET/SDH Pointers
  • 6.7 Next-Generation SONET (NGS)
  • 6.7.1 Next-Generation SONET Platform
  • 6.7.2 Next-Generation SONET Requirements
  • 6.7.3 Advantages of Next-Generation SONET
  • 6.8 SONET and SDH Standards Including NGS
  • Summary
  • Review Questions
  • Problems

Inspec keywords: SONET; video communication

Other keywords: synchronous digital hierarchy; exchange carriers standards association; video transmission; U.S; SDH; ANSI; synchronous optical network; STS; telecommunication transport; SONET; standard synchronous transport signal; European telecommunications; ECSA; fiber optic cabling

Subjects: Optical fibre networks

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