FTRJ-8519

1000BASE-SX SFP operates on ordinary multimode fiber optic
link spans of up to 550 meters in length

FTRJ-1519

1000BASE-ZX SFP operates on ordinary single-mode fiber optic
link spans of up to 70 kilometers (km) in length

FCM-8520

 1000BASE-T, Copper, GBIC, 100m