Parameters of EIA/TIA 568

  • Up to 50,000 users
  • Facilities up to 10 million square feet
  • 90 meter horizontal distance limit between closet and desktop
  • 4 pairs of conductors to each outlet—all must be terminated
  • 25-pair cables may not be used (crosstalk problems)
  • May not use old wiring already in place
  • Bridge taps and standard telephone wiring schemes may not be used
  • Requires careful installation procedures
  • Requires extensive testing procedures