Category Archives: SFP/SFP+

Fibre Channel SFP: Why Fibre Channel?

With the advent of SFP transceiver communication, there have been many different standards. In network hardware, the advantage of SFP transceivers is that they allow a single device, such as a switch, to support different cabling and transmission formats. However, when you try to find out which optical transceiver type you need, you will encounter problems. Because there are several different types of fiber SFP that can support a variety of communication standards, such as CWDM/DWDM, SONET, fibre channel, Fast Ethernet, and Gigabit Ethernet. Today we are going to introduce fibre channel SFP.

fibre channel sfp

Fibre Channel SFP

What Is Fibre Channel?

Fibre channel is a protocol mainly used for “storage area network”. Fibre channel speeds are different, ranging from 1, 2, 4, 8, 16Gbps to 128Gbps. Fibre channel is a lossless protocol developed when switches are not as reliable as they are now. When using Ethernet as a protocol, frames are discarded, which brings problems to applications such as data traffic. With the development of technology, switches are now becoming more reliable. However, fibre channels still have a small advantage over Ethernet in terms of consistency and latency.

What Is Fibre Channel SFP?

Fibre channel SFP transceivers is an important device for connecting fibre channel networks in data centers. It provides an interface between fibre channel system and SAN optical fiber. Fibre channel SFP transceiver is a common module in storage area network (SAN), which can provide 1, 2, 4, 8, 10, 16 and 20Gbps data transmission rate. Fibre channel SFP transceiver can be used for single-mode and multimode fiber applications.

Fibre Channel SFP: Why Fibre Channel?

Fibre channel, as a set of advanced data transmission standards, allows large amounts of data to be reliably moved at thousands of megabits between computers, servers, disk arrays, and other devices. Fibre channels are chosen for high-end storage connections because they have three main advantages: high speed, proven reliability, and guaranteed ordered packet transmission.

  • High speed: The original version of the fibre channel runs at the maximum data rate of 1Gbps. Now it can run at the rate of 128Gbps.
  • Proven reliability: fibre channels were initially accepted by almost all the world banks, Fortune 500 companies, and other organizations. These enterprises and organizations needed reliable and timely data transmission no matter how much it costs. Nowadays, the reliability of data transmission is still crucial. fibre channels are the most reliable for any enterprise or organization. Moreover, the choice of the fibre channel is not expensive.
  • Guaranteed in-order delivery: Fibre channel ensures that the raw block data is transmitted sequentially. Sequential delivery greatly improves network efficiency and is required by some applications, such as video streaming and IP streaming. Fibre channel naturally streams video frames sequentially, eliminating the bottleneck of reorganization. Otherwise, the frame speed per second required for video will be reduced seriously.


In summary, the advantages of fibre channel are still abundant, such as fast speed, reliability and sequential delivery, which is why we advocate fibre channel SFP. You can find high-quality FC SFP on FS.COM, such as 2G/4G FC SFP, 8G/10G FC SFP + module. Besides, we can also supply Gigabit SFP, 40G QSFP+ and 100G QSFP28. We offer a full range of branded and reasonably priced 100% compatible transceivers to meet your business need.

Understanding 1000BASE-LX SFP and 1000BASE-LH SFP

As the industry of optical communication develops rapidly, the design of optical fiber transceiver is more and more diversified, so as to meet the needs of Gigabit Ethernet. Therefore, various types of mini GBIC (SFP, Small Form-factor Pluggable) and SFP+ emerged. Gradually, we always see 1000BASE-LX SFP and 1000BASE-LH SFP on many websites. However, many people are puzzled about them. Are they similar or different? If they are different, about 1000BASE SFP LX vs LH: what is the difference between them?



SFP LX vs LH: What Are They?

If you want to understand 1000BASE-LX SFP and 1000BASE-LH SFP, you first need to understand what Ethernet is. Ethernet was the result of research done at Xerox PARC in the early 1970s, and it later developed into a widely implemented physical and link layer protocol. Fast Ethernet increased from 10 to 100 megabits per second. Gigabit Ethernet was the next iteration, whose speed was increased to 1000 megabits per second. The initial standard for Gigabit Ethernet was produced by the IEEE in June 1998 as IEEE 802.3z, which is often referred to as “1000BASE-X”. 1000 BASE-X is used in industry and refers to Gigabit Ethernet transmission through fiber optics, including 1000BASE-SX, 1000BASE-LX10, 1000BASE-BX10 and our today’s topic 1000BASE-LX.


The rate of 1000BASE-LX SFP is as high as 1.25Gbp/s, and the wavelength of long wavelength laser is 1270nm to 1355nm. LX SFP can be used in single mode and multimode systems, which makes them have some advantages in multimode applications. Although LX SFP is designated to transmit up to 5 kilometers of data over a single mode fiber, it also supports multimode fiber systems with a maximum distance of 550 meters. It is noteworthy that for a distance of more than 330 meters in a multimode fiber, a special transmit-modulated patch cord is needed to reduce the differential mode delay effect.


LH means longer distance. 1000BASE-LH also refers to Gigabit Ethernet transmission. The wavelength of 1000BASE-LH SFP is 1310 microns, and the transmission distance is between 25 km and 70 km. However, 1000BASE-LH is only a term widely used by many suppliers.

SFP LX vs LH: What’s the Difference?

Both 1000BASE-LX and 1000BASE-LH refer to Gigabit Ethernet transmission. Between them, just like mentioned above, 1000BASE-LX is the standard stipulated of IEEE 802.3. It uses long wavelength lasers. While 1000BASE-LH is only a term widely used by many suppliers. Besides, LH means longer distance, while LX (long wavelength) means shorter energy, which is obviously shorter distance. The 1000BASE-LX SFP module compatible with the IEEE 802.3z 1000BASE-LX standard, it can achieve a distance of 10 km over a single-mode fiber. Unlike the 1000BASE-LX SFP module, 1000BASE-LH SFP module can operate at a distance up to 70km over single mode fiber.

Does 1000BASE-LX SFP Work with 1000BASE-LH SFP?

1000BASE-LX SFP and 1000BASE-LH SFP are the most commonly used components in Gigabit Ethernet applications. Here comes a little question: Does 1000BASE-LX SFP work with 1000BASE-LH SFP? The answer is: Yes, 1000 BASE-LX SFP can work with 1000 BASE-LH SFP. For example, Cisco 1000 BASE LX/LH SFP is either made for single mode (long distance) or multimode (short distance). But this module can also be used for both single mode and multimode. In additional, as there are so many types on the market, careful attention should be paid to the distance and price differences between multimode and single mode fibers.


To sum up, about the topic “1000BASE SFP LX vs LH”, we can conclude that: 1000BASE-LX and 1000BASE-LH both refer to Gigabit Ethernet transmission; between them, 1000BASE-LX is a standard, 1000BASE-LH is the term widely used by suppliers. FS.COM offers a wide range of 1000BASE-LX/LH SFP transceiver modules which are compatible with major brands, like Cisco, Juniper, Dell, Brocade, etc. Our optical transceivers are able to fulfill enterprises, service providers, telecom operators and SAN providers to build and fulfill their existing and future network expansions. If you have any need, please contact us.