Specifications

B.3 Media Types and Maximum Distances
FDDI Overview B–5
B.3 Media Types and Maximum Distances
B.3.1 Important Characteristics
FDDI allows links to be built from the following media types.
Fiber Media Fiber Type
(Microns)
Power
Budget
(Decibels)
Maximum Link
Distance
(Kilometers)
Multimode
Fiber (MMF)
62.5/125 11 2.0
Single-mode
Fiber (SMF)
8-to-10 22 60
Copper Media Copper Type Maximum
Link Distance
Unshielded Twisted Pair
(UTP)
100 ohm Category 5
Twisted Pair
100 meters
Screened Twisted Pair 100 ohm Category 5
Twisted Pair
100 meters
Shielded Twisted Pair 150 ohm Category 5
Twisted Pair (equivalent to
IBM Type 1 cable.)
100 meters