The best replacement for optic is cable.

The best alternatives to optic are rated as following:
★★★★★  cable
★★★★  cable internet
★★★  coaxial
★★★  hdmi
★★  faze
★★  digital coax
★  envy
★  complexity
★  cable modem
★  tritium sights
★  nv
★  envyus
★  copper wire
★  faze ghosts
★  col
★  unite
★  dsl
★  copper cable
★  exile
★  sb
★  obey
★  leverage
★  faze bo2
★  digital coaxial cable
★  satellite
  coax cable
  tk
  coaxial cable
  hdmi for audio
  fiber optic
  fariko
  hdmi cable
  comcast cable
  curse ny
  epsilon
  utp cable
  tritium
  fiberoptic
  cat 6
  t1
  cat6
  digital coaxial
  dsl internet
  iron sights
  twisted pair
  broadband

Your alternative for optic is not listed? Suggest!
Speaking about optic, one probably shouldn't forget about line rental.

Other search terms related to optic and their ratings are:
★★★★★ line rental
You have in mind a companion for optic and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of optic in all years. Click on graph for more.
optic
cable
cable internet