Cabling Solutions for 100G QSFP28 Transceiver

Since the demand for high speed data transmission keeps growing, 100G Ethernet has been widely deployed in data center. Designed for high port density with small compact size and low power consumption, 100G QSFP28 transceivers domain the 100G transceiver module market. There are four 100G QSFP28 transceiver types popular on the market—100GBASE-SR4 QSFP28 transceiver, 100GBASE-PSM4 QSFP28 transceiver, 100GBASE-CWDM4 QSFP28 transceiver and 100GBASE-LR4 QSFP28 transceiver. And in this article, I will share cabling solutions for 100G QSFP28 transceiver with you.

We know that the above four 100G QSFP28 transceiver types can be divided into two categories according to the interface: 100GBASE-SR4 QSFP28 and 100GBASE-PSM4 QSFP28 are with MTP/MPO interface, while 100GBASE-CWDM4 QSFP28 and 100GBASE-LR4 QSFP28 are with duplex LC interface (shown as the figure below). Therefore, the cabling solutions are different respectively.

100G QSFP28 transceiver

Cabling Solution for 100G QSFP28 with MTP/MPO Interface

This kind of 100G QSFP28 transceiver is usually used with 100g MPO cable. For example, 100GBASE-SR4 QSFP28 can support 100G optical links over eight fibers and it can be connected with a 12-fiber MTP/MPO patch cable (four fibers for transmit, four fiber for receiver, leaving four fiber unused). Similar to 100GBASE-SR4 QSFP28, 100GBASE-PSM4 QSFP28 is also used with 12-fiber MTP/MPO patch cable. However, 100GBASE-SR4 QSFP28 utilizes multimode cable for 100 meters data transmission distance while 100GBASE-PSM4 QSFP28 utilizes single-mode cable for 500 meters optical links. Take 100GBASE-SR4 QSFP28 for example, the following figure shows that two 100GBASE-SR4 QSFP28 transceivers are connected with a multimode 12-fiber MTP trunk cable.

Cabling Solutions for 100GBASE-SR4 QSFP28 Transceiver

The following figure shows that with the use of multimode MTP-LC 8f fanout patch cord, one 100GBASE-SR4 QSFP28 transceiver can be connected with four 25GBASE-SR SFP28 transceivers.

100GBASE-SR4 with four 25GBASE-SR SFP28

Cabling Solution for 100G QSFP28 with Duplex LC Interface

Structured with duplex LC interface, 100GBASE-CWDM4 QSFP28 and 100GBASE-LR4 QSFP28 are usually used with single-mode patch cables with LC duplex connectors. When upgrading the network, we often meet the problem that we have to replace all the fiber patch cables. However, you do not have to worry about this issue if your transceivers are 100GBASE-CWDM4 QSFP28 and 100GBASE-LR4 QSFP28. Common single-mode duplex LC patch cable can meet the cabling requirement of these two transceivers. The following figure shows that two 100GBASE-CWDM4 QSFP28 transceivers are connected with a single-mode duplex LC patch cable.

Cabling Solutions for 100GBASE-CWDM4 QSFP28 Transceiver


For 100G QSFP28 with MTP/MPO interface, you can choose MTP/MPO cable, but remember that 100GBASE-SR4 QSFP28 utilizes multimode cable while 100GBASE-PSM4 QSFP28 utilizes single-mode cable; for 100G QSFP28 with duplex LC interface, you can use duplex LC patch cable for long distance transmission. I hope after reading this article, you can get something helpful. The transceivers and fiber optic cables mentioned above can be found at FS.COM. For more details, you can visit our site.

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Overview of 100G Transceivers

There was a time when 10G to 40G migration was a hot spot, and as the only available 40G transceiver, 40G QSFP+ has occupied the major position in the market. However, the pace of development has never stopped and the demand for higher speed data transmission keeps growing. And now, many data center managers set their sight on 100G Ethernet. As an important component in 100G optical links, 100G transceivers gradually gain great popularity among data center managers. But unlike 40G transceiver, 100G transceiver has several types, such as CFP/CFP2/CFP4, CXP and QSFP28. How much do you know about them? This article is going to give an overview of 100G transceivers.


The letter “C” in CFP/CFP2/CFP4 stands for 100. The CFP transceiver is specified by MSA between competing manufacturers and it can support 100Gbps over both single-mode and multimode fiber. The electrical connection of a CFP uses 10 x 10G lanes in each direction (RX, TX) while the optical connection can support both 10 x 10G and 4 x 25G variants of 100G interconnects. With improvement in higher performance and higher density, CFP2 and CFP4 appeared. While electrical similar, they specify a form factor of 1/2 and 1/4 respectively in size of CFP. CFP, CFP2 and CFP4 modules are not interchangeable, but would be inter-operable at the optical interface with appropriate connectors.


Here is a table for you which shows five typical transceiver types. We can get that CFP-SR10-100G is structured with 24-fiber MTP connector interface, so it can be used with multimode MTP 24 to MTP 24 100g trunk cable to support 100G optical links over short distance; designed with LC duplex interface, CFP-LR4-100G, CFP-ER4-100G, CFP2-LR4-100G and CFP4-LR4-100G are used with LC duplex patch cable to support 100Gbps data rate over long distance.

CFP CFP2 CFP4 transceiver information


The CXP was created to satisfy the high-density requirements of the data center, targeting parallel interconnections for 12x QDR InfiniBand (120G), 100G, and proprietary links between systems collocated in the same facility. The CXP is 45 mm in length and 27 mm in width, making it slightly larger than an XFP. It includes 12 transmit and 12 receive channels in its compact package. This is achieved via a connector configuration similar to that of the CFP.


Similar to 40G QSFP+, 100G QSFP28 also offers four independent transmit and receiver channels, but each channel is capable of 25Gbps data rate for an aggregate data rate for 100Gbps. With an upgraded electrical interface to support signaling up to 25Gbps signals, the 100G QSFP28 makes it as easy to deploy 100G network as 10G networks. When compared to any of the other alternatives, the 100G QSFP28 increases density and decreases power and price per bit, but It has to noted that 100G QSFP28 has the same physical size as 40G QSFP+. Just like 40G QSFP+, 100G QSFP28 can be both deployed for short data transmission distance over multimode fiber and long data transmission distance over single mode fiber. For example, 100GBASE-PSM4 QSFP28 can be used with MTP single mode cable to support 100G data rate with link length up to 500 meters.

100G QSFP28 transceiveres


Now is the time of 100G Ethernet and 100G transceivers are indispensable to complete the 100G optical links. As there are various types of 100G transceivers available on the market, it is necessary to choose the best suitable one for your network deployment. As a professional manufacturer and supplier in optical communication industry, FS.COM provides a complete range of 100G transceivers to meet the potential requirements. The prices of all our 100G transceivers are much more affordable than the similar products in the market. Furthermore, with the mature coding technology, they can be compatible with many major brands. For more details, please visit our site.

Focus on 100G QSFP28 Transceiver

To satisfy the increasing demand for high speed data transmission, network technology has been developed rapidly, from Fast Ethernet, Gigabit Ethernet to 10G, 40G, and even 100G Ethernet. And we know that 40G network technology has been widely applied for a long time. But now, the time of 100G is coming. Though for many data centers, 40G is enough for them now, the pace of development is unpredictable. In addition, some data centers have been already migrated to 100G and a range of 100G fiber optic transceivers are available on the market, among which 100G QSFP28 transceivers are considered to be the preference choice. This article will focus on 100G QSFP28 transceiver and help you choose a suitable 100G QSFP28 transceiver for your network deployment. First, let’s come to the basic knowledge of four 100G QSFP28 transceiver types.

100GBASE-SR4 QSFP28 Transceiver

100GBASE-SR4 QSFP28 transceiver offers four independent full-duplex transmit and receiver channels, each capable of running up to 25Gpbs data rate per channel. Like 40GBASE-SR4 QSFP+ transceiver, 100GBASE-SR4 QSFP28 transceiver is structured with 12 fiber MPO connector interface and it can support 100G data transmission with link length up to 70 meters over OM3 and 100 meters over OM4.

100GBASE-PSM4 QSFP28 Transceiver

100GBASE-PSM4 is defined by MSA and it uses four independent parallel lanes for each signal direction, with each lane carrying 25G data transmission. Terminated with 12 fiber MPO connector interface, it can support 100G data transmission with link length up to 500 meters over single-mode fiber.

100GBASE-CWDM4 QSFP28 Transceiver

100GBASE-CWDM4 QSFP28 transceiver complies with the requirement of CWDM4 MSA. Based on CWDM technology, the 100GBASE-CWDM4 QSFP28 transceiver uses four lanes of 25Gbps. On the transmit side, the four 25G optical signals are multiplexed while on the receive side, the four 25G optical signals are de-multiplexed. Terminated with duplex LC interface, it can support 100G data transmission with link length up to 2 kilometers over single-mode fiber.

100GBASE-LR4 QSFP28 Transceiver

100GBASE-LR4 QSFP28 transceiver uses the WDM technologies for four 25G lanes transmission and the four 25G optical signals are being transmitted over four different wavelengths. Like 40GBASE-LR4 QSFP+ transceiver, the 100GBASE-LR4 QSFP28 transceiver has duplex LC interface and it can support 100G dual-way data transmission with link length up to 10 kilometers over single-mode fiber.

Which One to Choose?

From the above content, we can easily find that among four types of 100G QSFP28 transceivers, there are not only differences but also similarities. For example, 100GBASE-SR4 QSFP28 and 100GBASE-PSM4 QSFP28 are with MTP/MPO interface, while 100GBASE-CWDM4 QSFP28 and 100GBASE-LR4 QSFP28 are with LC interface; 100GBASE-SR4 QSFP28 is suitable for for short distance over multimode fiber, while 100GBASE-PSM4 QSFP28, 100GBASE-CWDM4 QSFP28 and 100GBASE-LR4 QSFP28 are suitable for long distance over single-mode fiber. Which one to choose depends on your specific requirements for network deployment. To better distinguish these four 100G QSFP28 transceiver types, here is a table for you.

four 100G QSFP28 transceiver types


100G QSFP28 transceiver is designed for high port density with small compact size and low power consumption. As 100G Ethernet is an inevitable trend, 100G QSFP28 transceiver is the key for 100G migration. Therefore, it is necessary to have a basic knowledge about 100G QSFP28 transceiver. Apart from this, before you carry out your network deployment, choosing a suitable transceiver is essential. All four 100G QSFP28 transceiver types mentioned in this article can be found in FS.COM. If you want to know more details, please visit our site.

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Can 40GBASE-LR4 Be Used for 4x10G?

We know that 40GBASE-SR4 QSFP+ transceiver can be used for 4x10G SFP+ connections, because it offers 4 independent transmit and receive channels, each capable of 10G operation for an aggregate data rate of 40G over 100 meters of OM3 MMF or 150 meters of OM4 MMF. However, for 40GBASE-LR4 QSFP+ transceiver, it is commonly utilized over long transmission distance of SMF in 40G network applications. Can 40GBASE-LR4 be used for 4x10G? The answer depends and this article will focus on this question.

40GBASE-LR4 CWDM QSFP+ Transceiver Cannot Be Used for 4x10G

The 40GBASE-LR4 CWDM QSFP+ transceiver, such as QSFP-40GE-LR4, is compliant to 40GBASE-LR4 of the IEEE P802.3ba standard. It contains a duplex LC connector for the optical interface. The maximum transmission distance of the transceiver is 10km over SMF. In the transmit side, the transceiver converts 4 inputs channels of 10G electrical data to 4 CWDM optical signals by a driven 4-wavelength distributed feedback (DFB) laser array, and then multiplexes them into a single channel for 40G optical transmission, propagating out of the transmitter module from the SMF. Reversely, the receiver side accepts the 40G CWDM optical signals input, and demultiplexes it into 4 individual 10G channels with different wavelengths. Each wavelength channel is collected by a discrete photo diode and output as electric data after being amplified by a transimpedance amplifier (TIA). Therefore, 40GBASE-LR4 CWDM QSFP+ transceiver cannot be used for 4x10G. It cannot be split into 4x10G, because it uses 4 wavelengths on a pair of single-mode fiber with LC duplex connector, and does not allow itself to split into 4 pairs without substantial complexity to split out the wavelengths.

Working Principle of 40GBASE-LR4 CWDM QSFP+ Transceiver

40GBASE-LR4 PSM QSFP+ Transceiver Can Be Used for 4x10G

The 40GBASE-LR4 PSM QSFP+ transceiver is a parallel single-mode optical transceiver with an MTP/MPO fiber ribbon connector. It also offers 4 independent transmit and receive channels, each capable of 10G operation for an aggregate data rate of 40G on 10km of single-mode fiber. The transmitter side accepts electrical input signals compatible with common mode logic (CML) levels. All input data signals are differential and internally terminated. The receiver side converts parallel optical input signals via a photo detector array into parallel electrical output signals. That’s to say, the parallel optical signals are transmitted parallelly through 8 single mode fibers. As a result, 40GBASE-LR4 PSM QSFP+ transceiver can be used for 4x10G, because it uses parallel (ribbon) fiber with MTP/MPO connector, which allows the creation of 4 fiber pairs.

Working Principle of 40GBASE-LR4 PSM QSFP+ Transceiver

Note: From an optical transceiver module structure viewpoint, PSM uses a single uncooled CW laser which splits its output power into four integrated silicon modulators. Therefore, it allows for splitting into 4x10G (single-mode).


In a world, the answer of question “Can 40GBASE-LR4 be used for 4x10G?” depends. The 40GBASE-LR4 CWDM QSFP+ transceiver cannot be split into 4x10G, while for 40GBASE-LR4 PSM QSFP+ transceiver, it cab be used for 4x10G. To put it simply, 40G QSFP+ transceiver which is with MTP/MPO interface can be used for 4x10G connections, otherwise, it can only support 40G link. The 40G QSFP+ transceivers mentioned above can be found in FS.COM, if you want to know more details, please visit our site.

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Practical Knowledge About Optical Module

With the rapid development of fiber optical technology, various optical communication products are available on the market. Optical module is a small size but important optical component in telecommunication and data communication applications. Being able to realize the photoelectric conversion, it is popular among network users and vendors. To avoid unnecessary loss when using optical modules, it is necessary to master the skill of selecting patch cable for an optical module as well as installing or removing an optical module. This passage is going to guide you how to select patch cable for optical module and install or remove optical module.

Overview of Optical Modules and Patch Cables

Before we come to the practical content, let’s learn something basic about optical modules and patch cable. Optical module is a self-contained component that can both transmit and receive signals. Usually, it is inserted in devices such as switches, routers or network interface cards which provide one or more transceiver module slot. There are many optical module types (shown in the figure below), such as SFP, X2, XENPAK, XFP, SFP+, QSFP+, CFP and so on.

Optical Modules

A patch cable is a electric or optical cable terminated with connectors on both ends. It is used to connect one electronic or optical device to another for signal routing. Optical patch cables are now widely used in data centers for data transmission. They have different connector types (shown in the figure below), like LC, SC, ST and FC, etc. They also have different fiber types, like single-mode patch cable, multimode patch cable, simplex patch cable, duplex patch cable and so on.

Optical Connectors

Selecting Patch Cable for Optical Module

There are three basic aspects that you have to consider when selecting patch cable for optical module—transmission media, transmission distance and rate as well as module interface. Transmission media can be optical fiber or copper; transmission rate will decrease as the transmission distance increases in the fiber optic cables; duplex SC and LC interfaces are usually employed, and some optical modules often use MPO/MTP interfaces. Let’s take Cisco GLC-LH-SM Compatible 1000BASE-LX/LH SFP Transceiver for example, and its detailed information is shown in the table below. From the table, we can easily find that this GLC-LH-SM 1000BASE-LX/LH SFP Transceiver can transmit and receiver data signals over SMF with LC duplex connector and operating at 1310nm wavelength. So when connecting two transceivers of this type, we are supposed to use a single-mode patch cable with LC-LC connector.

Detailed Information of Cisco GLC-LH-SM Compatible 1000BASE-LX/LH SFP Transceiver

Installing or Removing Optical Module

After knowing how to select patch cable for your optical module, let’s move on to how to install or remove optical module effectively. First, there are several warming tips about installing or removing optical module:

  • To prevent the cables, connectors and the optical interfaces from damages, you must disconnect all cables before installing or removing an optical module.
  • Remember to protect the optical modules by inserting clean dust plugs into them after the cables are removed. Avoid getting dust and other contaminants into the optical ports of your optical modules.
  • Frequently remove and install an optical module can shorten its useful life. Thus, you should remove or insert it unless it is necessary.
  • Optical modules are sensitive to static, so be sure to use an ESD wrist strap or comparable grounding device during both installation and removal.
Installing Procedure

Step 1. Attach an ESD (electric-static discharge) preventive wrist strap to your wrist and to the ESD ground connector or a bare metal surface on your chassis.
Step 2. Remove the optical module from its protective packaging.
Step 3. Check the label on the module body to verify that you have the correct module for your network.
Step 4. Align the optical module in front of the socket opening.
Step 5. Insert the optical module into the socket until the module makes contact with the socket connector.

Removing Procedure

Step 1. Attach an ESD-preventive wrist strap to your wrist and to the ESD ground connector or a bare metal surface on your chassis.
Step 2. Disconnect and remove interface cable from optical module.
Step 3. Immediately install the dust plug into the module’s optical bore.
Step 4. Slide the optical module out of the socket connector.
Step 5. Place the removed optical module into an antistatic bag.

In fact, different types of optical modules have different structures, so remember to follow the instruction when inserting them into the socket or removing then out of the socket connector.


Optical module, essentially completing the conversion of data signals between different media, can realize the connection between two switches or other devices. It has become the key component in today’s transmission network. Therefore, it is helpful to learn how to select patch cable for an optical module as well as install and remove an optical module, even though you are not a professional telecom engineer. I hope this passage can help you during the operation.

Learn More About SFP+ Modules

With the rapid development of network, 10 Gigabit Ethernet has been widely used in various fields. Therefore, SFP+, a kind of optical communication product which can support 10 Gigabit Ethernet, has gained much attention among data network users and vendors. Take Finisar 10G SFP+ as an example. Finisar is one of the world’s largest telecom suppliers and wins large market share with its SFP+ transceivers. The Finisar Compatible 10GBASE-SR SFP+ with 850nm wavelength and LC duplex can transmit at the data rate up to 10 Gbps. It is obvious that this kind of product meets the requirement of high transmission data rate in application. Is this the only reason why SFP+ becomes popular? The answer is “Definitely not”. This passage will guide you to learn more about SFP+ modules.

Overview of SFP+ Module

SFP+ module, or SFP Plus, is a hot-pluggable, small-footprint optical transceiver that supports data rate up to 10 Gbit/s. It also supports 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. In addition, as an enhanced version of SFP module, SFP+ module is interchangeable with SFP module and can be used in the same cages as SFP module, allowing the equipment manufacturer to reuse existing physical designs for high-density port switches and modular line cards. Here is a picture of SFP+ module.

SFP Plus


Besides being able to transmit at data rate up to 10Gbps, SFP+ is also characterized by other features, such as smaller in size, lower in cost and more efficient in the application.


SFP+ modules leave more circuitry to be implemented on the host board instead of inside the module. For example, SFP+ module significantly simplifies the functionality of the 10G optical module by moving such functions as clock and data recovery (CDR), electronic dispersion compensation (EDC), 10G SERDES, and signal conditioning that traditionally resided inside the XAUI-based module into 10GbE PHY devices and line cards. As a result, the modules are smaller. The figure and table below shows the comparison between X2, XFP and SFP+.

Comparison Between X2, XFP and SFP+

Comparison Between X2, XFP and SFP+ Shown in the Table


From the figure and table above, we can easily find that SFP+ module form factor is 30% smaller in comparison to X2 or XFP modules. In addition, it uses less power, requires fewer components, and is less expensive than the 10-Gigabit small form-factor pluggable module (XFP) form factor, which was already smaller and used less power than the XAUI-based XENPAK and X2 form factors. Here is a table showing the price of Cisco 10Gbit/s X2, XFP, XENPAK and SFP+.

The Price of Cisco 10Gbit/s X2, XFP, XENPAK and SFP+

More Efficient

Each SFP+ module houses an optical transmitter and receiver. One end of the module is an SERDES framer interface (SFI) serial interconnect, which handles differential signals up to 10 Gbps; while the other end is an optical connection that complies with the 10GbE and 8GFC standards. SFP+ modules do only optical to electrical conversion, no clock and data recovery, putting a higher burden on the host’s channel equalization. And it has become the most popular module on 10GE systems for allowing higher port density.


From the beginning of the passage, we have known that SFP+ is widely used in 10 Gigabit Ethernet applications. In fact, SFP+ module has different types to meet different requirements in the application. For example, SFP-10G-SR (shown in the figure below) uses 850 nm lasers ad it is suitable for short reach links in high-speed interconnect application. Using 2000 MHz*km MMF (OM3), it is possible to reach up to 300m link lengths; while using 4700 MHz*km MMF (OM4), it is possible to reach up to 400m link lengths. Besides SFP-10G-SR, there are many other SFP+ module types, such as SFP-10G-USR, SFP-10G-LR, SFP-10G-ER and so on. By using different wavelengths, they are separately suitable for the ultra short reach, long reach, extended reach links in applications.


SFP+ can also be applied to Direct Attach Cable. As a cost-effective solution for short reach 10 Gigabit Ethernet application, SFP+ Direct Attach Copper Cable, a high speed copper directly connected with two SFP+ housings on either end, is widely used in high-speed interconnect applications such as high-performance computing (HPC), enterprise networking including top-of-rack switching and network storage markets.


As a new generation of small-factor form, hot-pluggable optic transceiver, SFP+ has been optimized in several aspects and can meet the requirement for high transmission data rate in the applications of telecommunication equipment, data center cabling infrastructure. I hope after reading this passage, you can have a thorough understanding of SFP+ module.

Introduction to Fiber Optic Transceivers

Fiber optic transceiver includes both a transmitter and a receiver in a single module. The transmitter and receiver are arranged in parallel and they have their own circuitry so that they can handle transmissions in both directions independently. Fiber optical transceiver plays the role of photoelectric conversion, that is, the transmitter converts electrical signals into optical signals, and optical signals are converted into electric signals by the receiver. Fiber optic transceiver has different types which can be classified by the following aspects.

Optical Fiber Type

The single-mode fiber transceiver is used with single-mode fiber cable and adopts LD or LED as light source. It can transmit data signals with high-bandwidth at long transmission distance. The multimode fiber transceiver is used with multimode fiber cable and adopts LED or laser diode as light source. Though the transmission distance is shorter than that of single-mode fiber transceiver, the multimode fiber transceiver is cheaper and its power consumption is lower.

Optical Fiber Count

Simplex fiber transceiver is used with simplex fiber optic patch cable and receives the data sent in a single fiber transmission. Duplex fiber transceiver is used with duplex fiber optic patch cable and receives data transmitted on a dual fiber transmission. Single-fiber optic equipment can save half of that achieved to receive and transmit data over a single optical fiber, optical fiber strain on the resources in place very applicable. These products use the wavelength division multiplexing techniques, mostly using the wavelength 1310nm and 1550nm.

Transmission Rate

Transmission rate refers to the number of gigabits transmitted per second, per unit of Mbps or Gbps. Optical modules cover the following main rate: low rates, Fast, Gigabit, 1.25G, 2.5G, 4.25G, 4.9G, 6G, 8G, 10G and 40G.

GBIC(Giga Bit Interface Converter)

GBIC is an input/output transceiver. Its one end is to plug into a Gigabit Ethernet port such as on the switches, and the other end is to connect the fiber optic patch cords and link the fiber optic networks. Therefore, GBIC modules function is to transform the signals between the Ethernet network and fiber optic network.



SFP is a kind of compact, hot-pluggable transceiver used for both telecommunication and data communications applications and it can be simply interpreted as an upgraded version of GBIC. Compared with GBIC, the size of SFP is reduced by half and SFP can deploy more than double the number of ports on the same panel.



XENPAK is the standard specification for optical transceivers in 10 Gigabit Ethernet. It is a highly integrated, serial optical transponder module for high-speed, 10Gbit/s data transmission applications. And it is designed to transmit and receive optical data of long transmission distance.



X2 is mainly used for switch or router with Ethernet X2 port and network connection port. It is evolved from XENPAK standard and its internal function modules are basically same with XENPAK’s. However, the improved X2 that is only half the size of XENPAK can be placed directly on the circuit board, so it is suitable for high-density rack system and PCI network card application.



XFP are standardized 10GBASE hot-swappable and protocol-independent modules. It fully complies with the following standards: 10G Fiber Channel, 10G Ethernet, SONET/OC-192 and SDH/STM-64. XFP is mainly used for data communication and fiber optic transmission of telecommunication transmission network.



SFP+ is an enhanced version of the SFP that supports data rates up to 10 Gbit/s. SFP+ supports 8 Gbit/s Fiber Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. And SFP+ leaves part of circuit on the motherboard instead of inside the module.



QSFP interfaces networking hardware to a fiber optic cable and supports data rates from 4×10 Gbit/s. And QSFP+ is an evolution of QSFP to support four 10 Gbit/sec channels carrying 10 Gigabit Ethernet, 10GFC Fiber Channel, or QDR InfiniBand. The 4 channels can also be combined into a single 40 Gigabit Ethernet link.


Fiber optic transceiver, essentially just completed the converted of data between different media, can realize the connection between two switches or computers in the 0-120km distance. It is mainly applied in data communication, computer video, wireless voice communication and so on. And different types of fiber optic transceivers can be chosen according to different occasions.