Synchronous Optical Network - SONET / SDH

• Bellcore on behalf of the RBOCS => SONET

• CCITT => SDH (synchronous digital heirarchy)

  • SDH ~ SONET

• Synchronous TDM system => 1 high BW channel

  • clock accuracy of 1 part in 10 to the 9th

• SONET Goals:

  • interoperability (US, Europe, Japan, Canada?)
  • 64 Kb/s PCM channels
  • higher levels of multiplexing (T3 => gigabits/s)
  • Provide operations, administration & maintenance => OAM

Previous slide

Next slide

Back to first slide

View graphic version