The Layer 1 failures reported and analyzed by the Optical Transport Manager Domain Managers are:

  • Equipment problems

  • Fiber cuts

  • Circuit pack failure

  • Port failure

  • And any other problems that cause the Layer 1 circuit to fail

    Layer 1 circuits are circuits that transport two Layer 3 devices at the following service layers:

  • DS3/VC3

  • STS-3C/VC4

  • STS-12C/VC4-4C

  • STS-48/CVC4-16C

  • STS-192C/VC4-64C

  • OC-48/STM-16 (WDM wavelength)

  • OC192/STM-64 (WDM wavelength)