J4858A/J4858B

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

J4859A/J4859B

1000BASE-LX/LH SFP operates on ordinary single-mode fiber optic
link spans of up to 10,000 meters in length

J4860A/J4860B

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