4.5 Given a scenario, troubleshoot and resolve common fiber cable issues - Paiet/Tech-Journal-for-Everything GitHub Wiki

4.5 Given a scenario, troubleshoot and resolve common fiber cable issues

• Attenuation/Db loss
  • Scattering & Absorption
  • Caused by:
    • Cable quality
    • Splices
    • Connectors
• SFP/GBIC - cable mismatch
  • Improper cable type doesn't allow you to connect devices
• Bad SFP/GBIC - cable or transceiver
  • Equipment Needed: OTDR (Optical Time Domain Reflectometer)
    • determine overall length
    • attenuation
    • faults
• Wavelength mismatch
  • Determined by the Transmitter
  • Transmitter and Receiver must match wavelength
• Fiber type mismatch
  • Single Mode to Multi Mode
  • results:
    • Wavelength mismatch
    • attenuation to signal loss
    • Db loss
• Dirty connectors
  • SDH-Cisco
  • OSP-Outside Plant
• Connector mismatch
  • some connectors are similar but may not be compatible.
  • e.g. FC and ST both use a similar 2.5mm ferrule for a connector
• Bend radius limitations
  • Tight bends can cause light to be loss through the cladding.
  • TIA standard is approximately minimum of 2" radius bend to prevent signal problems and breakage
• Distance limitations
  • Depends on the fiber mode (single or multi)