ITWissen.info - Tech know how online

IEEE 802.3 100GBase-SR4

Under 100 Gigabit Ethernet, there are several 100GbE interfaces for optical fiber, one of which is 100GBase-SR4, which can bridge distances of several hundred meters. This is a second-generation 100GbE interface, in which 25 Gbit/s each are transmitted via four parallel optical fibers.

The designation 100GBase indicates that the interface supports a data rate of 100 Gbit/s (100G) and operates in baseband technology (base). The specific characteristics can be seen from the suffix SR4. The letter "S" stands for Short and thus for a wavelength of 850 nm, the "R" identifies the interface type with 64B66B coding, and the number 4 states that the transmission is switched using Coarse Wavelength Division Multiplexing( CWDM) over four CWDM paths of a multimode fiber. As a light source, the SR4 interface uses a VCSEL array in which each VCSEL laser generates one of the four wavelengths. In this transmission, each CWDM path transmits a data rate of 25.78 Gbit/s.

Front panels with SFP+ and QSFP modules

Front panels with SFP+ and QSFP modules

Technically, the 100GBase-SR4 interface is implemented with an optical transceiver. The QSFP module is used as the module. The 100GBase-SR4 interface will be available in 2013.

Informations:
Englisch: IEEE 802.3 100GBase-SR4
Updated at: 25.07.2012
#Words: 185
Links: 100 Gigabit Ethernet (100GbE), 100 Gigabit Ethernet (100GbE), bridge, second (s), 100GbE interface
Translations: DE
Sharing:    

All rights reserved DATACOM Buchverlag GmbH © 2024