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1000BASE-LX is an optical fiber Gigabit Ethernet standard specified in IEEE 802.3 Clause 38 which uses a long wavelength laser (1,270–1,355 nm), and a maximum RMS spectral width of 4 nm. 1000BASE-LX is specified to work over a distance of up to 5 km over 10 μm single-mode fiber.
identical to 1000BASE-LX but increased power and sensitivity for up to 10 km over a pair of single-mode fiber; commonly called just 1000BASE-LX or, prior to 802.3ah, 1000BASE-LH; vendor-specific extensions exist for up to 40 km reach 1000BASE‑PX10‑D 802.3ah-2004 (60) SC, LC
1 Gb (1000 Mb) Ethernet 1000BASE-SX 1 Gb (1000 Mb) Ethernet 1000BASE-LX 10 Gb Ethernet 10GBASE-SR 10 Gb Ethernet 10GBASE-LRM (requires EDC) 25 Gb Ethernet 25GBASE-SR 40 Gb Ethernet. 40GBASE-SWDM4 40 Gb Ethernet 40GBASE-SR4 100 Gb Ethernet 100GBASE-SR10 FDDI (62.5/125) 160 / – / 500 MHz·km 2000 m [11] 220 m [12]
Many switches are PHY independent, meaning that a switch could have a mixture of copper, SX, LX, LX10 or other GBIC/SFP modular transceivers. While maintaining the same PHY is the usual approach, it is possible to aggregate a 1000BASE-SX fiber for one link and a 1000BASE-LX (longer, diverse path) for the second link.
Unlike most non-SFP, copper 1000BASE-T ports integrated into most routers and switches, 1000BASE-T SFPs usually cannot operate at 100BASE-TX speeds. 100 Mbit/s copper and optical – some vendors have shipped 100 Mbit/s limited SFPs for fiber-to-the-home applications and drop-in replacement of legacy 100BASE-FX circuits.
100BASE-T4 was not widely adopted but some of the technology developed for it is used in 1000BASE-T. [5] Very few hubs were released with 100BASE-T4 support. Some examples include the 3com 3C250-T4 Superstack II HUB 100, IBM 8225 Fast Ethernet Stackable Hub [12] and Intel LinkBuilder FMS 100 T4. [13] [14] The same applies to network interface ...
1000BASE-SX GBIC. Gigabit interface converter (GBIC) is a standard for transceivers.First defined in 1995, it was used with Gigabit Ethernet and Fibre Channel.By standardizing on a hot swappable electrical interface, a single gigabit port can support a wide range of physical media, from copper to long-wave single-mode optical fiber, at lengths of hundreds of kilometers.
The physical coding sublayer (PCS) is a networking protocol sublayer in the Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet standards. It resides at the top of the physical layer (PHY), and provides an interface between the physical medium attachment (PMA) sublayer and the media-independent interface (MII).
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