By | 14/02/2015

Two modes:fiber

  • Multi mode – 200m maximum for 10GB and 500m for 1GB
  • Single mode – from 500m to 50Km

Cisco SFP are different part numbers depending on the fiber mode



  • LC – Lucent Connector
  • SC – Subscriber Connector


Don’t mix fiber optic with fibre-channel. Fibre-channel is a transport protocol, initially designed to go over fiber, but that now it’s common to use it over copper.

Fibre-Channel uses US form of fibre

Fiber optic uses UK form of Fiber


OTDR – Optical Time-Domain Reflectometer – Characterize the optical fiber. It enjects optical pulses to test it from the same end.