Notes:
All 100Base standards use 4B/5B encoding, 125 Mbaud, three signal levels on copper, NRZI (non return to zero, ones inverted) on fiber. The additional symbols available in the 4B/5B are used to carry additional control signals link “IDLE”, “JAM”, etc.
1000BaseT uses 4D-PAM5 (4 data lines, 5 level PAM encoded) 0 to plus/minus 1 VDC on the wire, 125 M Baud on each of 4 data pairs (2 bits/baud)
1000BaseFx uses 8B/10B FC-1 Fibre Channel frame encoding, and NRZ on the fiber.
the standard specifies that multimode fiber is capable of transmitting at 10 gigabits/second over 82 meters using standard 50-µm fiber with minimum 850-nm bandwidth of 500 MHz·km; 66 meters using 400 MHz·km 50-µm fiber; 33 meters using 200 MHz·km; and 26 meters using 160 MHz·km 62.5-µm fiber. Distances up to 300 meters are possible with the new 50-µm 850-nm laser-optimized multimode fiber described here.