Editing Gigabit Ethernet (section)

===1000BASE-SX===
1000BASE-SX is an [[optical fiber]] Gigabit Ethernet standard for operation over multi-mode fiber using a 770 to 860 [[nanometer]], [[Infrared|near infrared]] (NIR) [[light]] [[wavelength]].

The standard specifies a maximum length of 220 meters for 62.5&nbsp;μm/160&nbsp;[[Modal bandwidth|MHz×km]] [[multi-mode fiber]], 275&nbsp;m for 62.5&nbsp;μm/200&nbsp;MHz×km, 500&nbsp;m for 50&nbsp;μm/400&nbsp;MHz×km, and 550&nbsp;m for 50&nbsp;μm/500&nbsp;MHz×km multi-mode fiber.<ref>{{Cite web|url=https://kb.wisc.edu/ns/page.php?id=7829|title=Ethernet Media Standards and Distances|website=kb.wisc.edu|access-date=February 1, 2017}}</ref><ref>IEEE 802.3 ''Table 38–2—Operating range for 1000BASE-SX over each optical fiber type''</ref> Fiber optic cable manufacturers have extended the reach of 1000BASE-SX to at least 1km when used with more modern fiber optic grades such as OM3 and OM4.<ref name="corning multimode 2012" />

This standard is highly popular for intra-building links in large office buildings, co-location facilities and carrier-neutral Internet exchanges.

Optical power specifications of SX interface: Minimum output power = −9.5&nbsp;[[dBm]]. Minimum receive sensitivity = −17&nbsp;dBm.