Now updated 10 gb networks

by:FOT     2020-07-13
Since the optical fiber 10 gbase - standard The SR since its launch, from the LAN backbone cabling infrastructure upgrades to support the activities of 10 Gb has been going on for several years, but many enterprise business before that don't need this kind of speed. Data center quickly upgrade to 25, 40 or 100 Gb rate, to support the fast rise in number of virtual servers, to accommodate more applications than ever before, and need to access, send, and storage of large amounts of data. At the same time, the needs of high-speed data transmission in the LAN also reached an unprecedented height, including wired and wireless connection. Although university and big companies such as financial institutions have to upgrade the LAN backbone, but there are still a lot of other institutions is only realized 1 Gb rate obviously can not meet the requirements. Now send out most of the information are concentrated in the data center of the fiber optic infrastructure upgrades to support rate of 40 Gb and 100 Gb, but we think it's only upgrade to 10 Gb of user should not be forgotten, and will benefit from reviewing key matters. Discussing upgrading to 10 Gb fiber rate, in the final analysis depends on whether the wiring to support such a rate, there are a lot of matters need to consider the total length of fiber types and channels. Commonly used in the multimode optical fiber LAN backbone facilities, signal variation is caused by mode dispersion. Mode dispersion occurs, optical pulse transmission and within a certain distance in different time reach the receiver, resulting in the error. This is a high speed transmission constraints. A new type of optical fiber with special design in order to prevent the mode dispersion, the old type 62. 5 microns multimode fiber. Using the optical fiber distributed data interface ( FDDI) Level of optical fiber network under the 10 Gb rate is limited to about 26 m - — The distance is not very realistic: most LAN backbone is close to the distance of 300 meters. In order to meet the requirements of the LAN backbone network distance, fiber must be upgraded to 50 mu m multimode fiber laser optimization, OM3 support distance 10 Gb rate of 300 meters, OM4 support distance 10 Gb rate of up to 400 meters. In addition to optical fiber type and the distance to reduce losses, can really say whether fiber optic backbone support key parameter is the attenuation rate of 10 Gb. By the parameter, we can know an end-to-end channel and how the loss of signal, and the strength still enough to support the application. Although some installer in calculating attenuation by getting away with 1 Gb system, but when we upgrade to 10 Gb rate, this practice is not desirable. 10 Gb channel maximum attenuation has 3 from 1 Gb application. Reduced to 2, 5 db. 6 db ( 850 nm OM3 fiber) 。 Attenuation is related to many factors - — Light source, type of cable used in the transmitter, the channel quality and quantity of the total length, connection and joint. Support on the rate of loss had the greatest influence and interfere with 10 Gb capacity optical fiber end face is the most common cause of pollution. Telecom room is not always the most clean environment, between optical fiber end face of any dirt or debris can cause loss of signal, back reflection, even damage the equipment. No matter what type of optical fiber, optical fiber right cleaning and inspection is to ensure that support is an indispensable part of 10 Gb. Even if you select the correct type of cable, and are sure to accept the distance limit and the maximum cleaning and check the fiber end face, but the only thing that can guarantee 100% support IEEE 802. 3 10GBASE- The SR application measures is fiber link for certification. Use optical loss tester (such as CertiFiberPro CFP - 100 - Q, CFP - 100 - 年代,CFP - 100 - M) Measure the attenuation level 1 test is one of the methods of authentication, and optical time domain reflectometer (such as using OptiFiberPro 游戏- - - - - - 100 - Q) 2 levels of tests can give to each element in the fiber channel ( And optical fiber, connectors and connectors) Attenuation, and may also affect loss events, such as fiber optic equipment bending. If there is no OTDR, it is hard to find and fix some loss. For the purposes of authentication, you need a tester can application according to the IEEE standards and TIA and wiring to the standards set by the ISO/IEC, qualified or unqualified results are given. With calculating attenuation or spend hours reading OTDR trajectory compared to qualified or unqualified indicator is much easier and fast. Fortunately, CertiFiber Pro and OptiFiber Pro provides this functionality.
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