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Current TAG : SFP

Differences between the RJ45 port and the SFP port of the switch

We know that in the present market, Gigabit Ethernet switches generally have two ports: RJ45 port and SFP port, both of which can be transmitted with Gigabit Ethernet. Then what are the differences between the two ports? How should we wire them respectively? This tutorial will answer one by one.Gigabit Ethernet switch’s RJ45 port and SFP portIn order to meet the growing network needs, network upgrade in the machine room of the data center or server is urgent. Therefore, Gigabit Ethernet has become increasingly common. So, what kind of port Gigabit switch should be used to achieve Gigabit Ethernet connection? The following is the introduction to two ports in detail:RJ45 portGigabit Ethernet switch’s RJ45 port is a built-in port. To connect two RJ45 port Gigabit Ethernet switches, we only need to use a super five or six cable. The following table is the specific rate and bandwidth of this connection:    Shielded level Maximum transfer rate(distan..

Two important elements about SFP optical modules

Distinction between SFP multi-mode and single-mode According to the wavelength, it can be divided into 850nm/1310nm/1550nm/1490nm/1530nm/1610nm. The one with wavelength of 850nm is SFP multi-mode with transmission distance of 2KM or less;The one with wavelength of 1310/1550nm is SFP single-mode with the transmission distance of over 2KM. The prices of the module with these three wavelengths are relatively cheaper than those of other three wavelengths.If there is no logo on bare module, it is easy to confuse, and the general manufacturers will distinguish between the color of the ring, such as the one of black pull ring is the multi-mode with the wavelength of 850nm while the ones of blue, yellow and purple pull ring are single modes with the wavelength of 1310 nm, 1550 nm, and 1490 nm respectively.Multi-mode:Almost all multimode fiber sizes are 50 / 125μm or 62.5 / 125μm, and the bandwidth (fiber’s information transmission rate) is typically from 200MHz to 2GHz. The multi-mode opt..

The difference between SFP and SFP+, XFP, QSFP, GBIC, BIDI

Nowadays, as the core optoelectronic device in the optical communication network, the types of the optical module is increasing, and its functions also becoming more and more complicated. Different types of optical modules are emerging such as SFP, SFP +, XFP, QSFP, GBIC and BIDI. We’ll take SFP optical module which is commonly used in the market as an example to talk about the difference among these similar optical modules.SFP optical module, which also known as small package pluggable optical module, and used in the telecommunications industry and optical communications. The interface of the SFP optical module is LC which the size is small, suitable for high-density cabling environment. Meanwhile, SFP has specifications that a variety of network electronic device vendors to support, mainly to support Gigabit Ethernet and fiber-optic network communications. The electrical interface of it is 20pin Gold-finger, data signal interface is basically same as SFF module’s.The difference betwe..

What is SFP-10G-SR?

Optical fiber communication technology plays an important role in the information transmission, which greatly improves the data transmission speed and becomes the main communication transmission technology in China. Optical module is a very important component in the optical fiber communication technology, and we often see the parameters of optical module that contains SFP-10G-SR. For professionals in the field of optical communications will clearly understand the meaning of it, but for some novice and layman, it is possible to can't fully understand. So let Cozlink ( to explain in detail what SFP-10G-SR is.What is SFP-10G-SR? In short, the SFP-10G-SR is a very common model of optical module, Cisco, Huawei and other manufacturers will produce it, and it mainly used in switches and routers, we can divide it into three elements to introduce.SFP (Small Form-factor Pluggable) refers to the small hot-swappable packaging module, it can be seen as an upgraded version of GBIC, and ..
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