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Like all other Ethernet interfaces, the 10GbEinterfaces are subject to the Ethernet nomenclature. According to this, 10GBase-LR is an interface for optical fibers.

The following can be read from the IEEE nomenclature 10GBase-LR: 10G stands for 10 Gigabit Ethernet, Base for baseband, the "LR" stands for Long Reach and applies to a monomode fiber with a wavelength of 1,550 nm and the "R" is used for a 64B66B coding. 10GBase-LR uses a Distributed Feedback Laser( DFB) or Fabry Perot Laser( FPL) and is designed for distances up to 10 km. This distance is often exceeded by a factor of two, with no loss of data. The 10GbE interface operates at a wavelength of 1,310 nm and with 64B66B coding on the Physical Coding Sublayer( PCS). 10GBase-LR uses OS class OS1 duplex monomode fiber for transmission, and the resulting baud rate is 10.3125 GBaud. LC and SCconnectors in duplex design are used as connectors.

Interface of 10 Gigabit Ethernet

Interface of 10 Gigabit Ethernet

The physical layer of 10GBase-LR corresponds to that of 10GBase-LW. Technically, the 10GBase-LR interface is implemented with an optical transceiver in an XFP module. It is used in metro and campus networks.

The 10GBase-LR version is also available for multimode fibers with a wavelength of 1,310 nm. The bridgeable distance is 220 m.

Englisch: IEEE 10GBase-LR
Updated at: 03.09.2019
#Words: 205
Links: Ethernet, interface (I/F), fibers, institute of electrical and electronics engineers (IEEE), Gigabit Ethernet (GbE)
Translations: DE

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