SONET / SDH

Sonet ( Synchronous Optical Networking)

  • American National Standards Institute (ANSI)
  • Used in US / Canada
  • Synchronous transport signals (STS) used for speed

Synchronous Digital Hierarchy

  • International Telecommunications union (ITU)
  • Used everywhere expect US / Canada
  • Synchronoous transport Modules (STM) used for speed)

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