Transmission Layer

• SONET/SDH transmission network

  • Current MCI transmission network consists of:
    • fiber plant between fiber junctions
    • SONET MUXes and Regenerators
      • 1:N OC48 systems
      • 1+1 OC192 systems
      • Broadband-DCSs for restoration (DS3/OC3/OC12)
      • 4-fiber OC192 BLSRs await MUX s/w
    • WDM (2 or 4 channels) in limited use

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