Category Archives: Fiber Optic Transceivers

What is Optical Transceiver Module?

The speed and stability of the network is making a great leap forward thanks to the high bandwidth and low attenuation brought by fiber optics. Optical transceiver module is the major building block in fiber optic network, which conveys the information across communication channels for your optical systems. This article offers some rudiments about optical transceiver module and suggestions of choosing fiber patch cable for your transceiver module.

Working Principle of Optical Transceiver Module

An optical transceiver module is a device that uses fiber optical technology to send and receive data. The transceiver module has electronic components to encode or decode data into light pulses and then send them to the other end as electrical signals. To send data as light, it makes use of a light source, which is controlled by the electronic parts, and to receive light pulses, it makes use of a photodiode semiconductor.

Types of Optical Transceiver Module

Optical transceiver module is evolving rapidly to meet the escalating demand for speed and capacity. The tendency is that fiber optic transceiver module is evolving to have smaller size and higher data rate. The common types of optical transceiver module include GBIC, SFP, 10G SFP+, 40G QSFP+, CXP, CFP, CFP2, CFP4, CPAK and QSFP28.

The emergence of GBIC (Gigabit Interface Converter) is a milestone of transceiver module development, and it’s of epoch-making significance. As time went on, the size of transceiver was becoming smaller, so SFP (Small Form-Factor Pluggable) transceiver module came into being. It is half the size of GBIC, and it increases the port density of the same line card by two times. But this is not enough to meet the growing need of higher speed network connectivity. So 10G SFP+ (Small Form-factor Pluggable Plus) and 40G QSFP+ (Quad Small Form-factor Pluggable Plus) becomes new market favorites, for they have distinctly higher data rate and the same mini size as SFP. Besides, 100G optical transceiver module is also popular at present, with the types of CXP, CFP, CFP2, CFP4, CPAK and QSFP28. Various types of optical transceiver module can meet all kinds of customer’s requirements.

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Optical Transceiver Module Parameters

Optical transceiver module has three main parameters which shows it’s capacity of connectivity. They are wavelength, data rate and cable distance.

Wavelength

Wavelength is the band of light used in the transmission of optical signals. The main wavelength of optical transceiver module is typically around 850, 1300 and 1550 nm, for the attenuation of the fiber is much less at those wavelengths. Besides, multi-mode fiber is designed to operate at 850 nm and 1300 nm, while single-mode fiber is optimized for 1310 nm and 1550 nm.

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Data Rate

Data rate refers to how many bits of data the optic fiber carries per second. The widely applied data rates are 155Mbps, 1.25Gbps, 2.5Gbps and 10Gbps. The data rate of optical transceiver can provide backwards compatibility. So 155M optical transceiver module is also called FE transceiver, and 1.25G optical transceiver module is called GE transceiver.

Transmission Distance

Transmission distance is the distance an optical signal can be transmitted directly without amplification. The optical transceiver with the transmission distance shorter than 2km is classified to multi-mode optical transceiver module, while the optical transceiver with the transmission distance over 2km is classified to single-mode optical transceiver.

Except the above three parameters, optical transceiver module has other parameters, which are output power, receiving sensitivity, bias current, extinction ratio, saturated optical power and working temperature.

How to Choose Fiber Patch Cable for Transceiver Module

Optic transceiver modules are correspondingly connected with different fiber patch cable according to the type of their interface. When you choose a fiber patch cable, you need to consider the following factors: fiber type, transmission distance, data rate and transceiver interface.

We suppose that you need to choose a right patch cable used between fiber optic transceiver SFP-10G-SR and X2-10GB-SR. You know that SFP-10G-SR is 10GBASE-SR SFP+ transceiver module for MMF, 850-nm wavelength, LC duplex connector. And X2-10GB-SR is 10GBASE-SR X2 transceiver module for MMF, 850-nm wavelength, SC duplex connector. It’s easy to find that X2-10GB-SR needs SC connector, and SFP-10G-SR requires LC connector. So we should choose patch cable with SC-LC connector with MMF, 850-nm wavelength. In the same way, you can choose the proper fiber patch cable for your transceiver modules.

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Conclusion

I believe that you get more familiar with optical transceiver module after knowing its’ types, parameters and how to choose fiber patch cable for it. You also need to know that, the chief advantage of optical technology is its high data transfer rate, which can in practice be several thousand times as fast as a cable modem Internet connection. And fiber optic transceiver plays an important role in fiber optical transmission. For purchasing more high quality optical transceiver modules with low cost or for more products’ information, please contact us at sales@fs.com.

Comparison of 10GBASE-T and 10G SFP+ Transceiver

With the growing need of higher capacity network connectivity, 10G network transmission is becoming increasingly popular. 10G SFP+ optical transceiver and 10GBASE-T copper transceiver are the two main options of 10G network. It becomes a challenge to choose the appropriate 10G connectivity for every IT worker. This article will compare 10GBASE-T with 10G SFP+ transceiver from the perspectives of power, latency, cost and interoperability. And try to give you some suggestions to choose between them.

Brief Introduction of 10GBASE-T and 10G SFP+ Transceiver Module

10GBASE-T transceiver module and SFP+ optical transceiver are two of the most widely used 10G network connectivity.

10GBASE-T Copper Transceiver

Applied initially in the data center and the horizontal cabling system, 10GBASE-T transceiver module is a new 10GE PHY using the existing MAC (Media Access Controller). It preserves the 802.3/Ethernet frame format at the MAC Client service interface. 10GBase-T works at 100 meters for Cat6a cable and up to 50 meters for Cat6 cable. It offers flexibility, low cost transmission media, and is backward-compatible with existing 1GbE networks.

10gbase-t
10G SFP+ Optical Transceiver

10G SFP+ transceiver is an enhanced version of the SFP transceiver that supports data rates up to 16 Gbit/s. It supports 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. SFP+ optical transceiver’s connector is duplex LC, and it operates on LC fiber patch cables. SFP+ transceiver is classified in different types, such as SR, LR, ER and ZR. They need to be used with appropriate fiber patch cable, like SR used with multimode fiber patch cable for short distance transmission, while LR, ER and ZR used with single mode fiber patch cable for relatively long links.

10g sfp+

10GBASE-T vs SFP+ Transceiver

After the brief introduction of the two transceiver modules, we will compare them from following perspectives.

Power and Latency

Recent advancements greatly lowered the power consumption of 10GBASE-T server and switch ports. Early versions of 10GBASE-T switches needed up to 12 Watts per port, switch vendors now offer a range of 1.5 to 4 Watts per port depending on distance. In spite of the reduced power consumption of 10GBASE-T transceiver, 10G SFP+ interface uses less power—typically less than 1 Watt per port.

With simplified electronics, 10G SFP+ transceiver also has lower latency—typically about 0.3 microseconds per link. 10GBASE-T transceiver latency is about 2.6 microseconds per link due to more complex encoding schemes within the equipment.

With lower power consumption and lower latency, 10G SFP+ optical transceiver is well suited for large high-speed data centers.

Cost and Interoperability

10GBASE-T switches has been available since 2008, the shipment of 10GBASE-T transceiver module has been increasing over the past years. This proliferation helps to drive down the cost of 10GBASE-T technology. With 10GBASE-T technology’s wide application, the use of 10G SFP+ transceiver module means additional cost for the servers equipped with 10GBASE-T NIC card. Comparing one of the latest 10G SFP+ and 10GBASE-T switches, the cost of 10GBASE-T transceiver ranges from 20% to 40% less.

10GBASE-T copper transceiver also has the advantage of being interoperable for using the familiar RJ45 connector and providing backwards compatibility with legacy networks. So it can be deployed in existing 1GbE switch infrastructures in data centers, enabling IT to keep costs down while offering an easy migration path to 10GbE. While 10GSFP+ optical transceiver are limited with little or no backwards compatibility.

Make an Informed Decision

When you choose between 10GSFP+ optical transceiver and 10GBASE-T copper transceiver, consider your needs carefully. If lower power consumption and lower latency are significant, 10GSFP+ transceiver might be the better choice for you. If lower cost and better Interoperability are important, 10GBASE-T transceiver might be more suitable for you. FS provides an extensive selection of 10GBASE-T, 10G SFP+ transceiver and transceiver module of other data rate, such as 1G, 25G, 40G, 100G and so on. For more details about FS 10GBASE-T transceiver module and 10G SFP+ optical transceiver, please contact us at sales@fs.com.

GLC-SX-MM VS GLC-SX-MMD VS GLC-SX-MM-RGD VS SFP-GE-S

Cisco is a worldwide leader in the telecommunication industry whose routers, switches are very welcome among the users. To work well with those Cisco networking applications, Cisco SFP transceivers are the best choice. GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD and SFP-GE-S are different types of Cisco 1000BASE SFP transceiver module. All these transceiver modules comply with IEEE 802.3z 1000BASE standard. And since there are similar specifications for these four transceiver modules, users may be confused when they need to choose one SFP module for their Cisco switches. Here we’ll make a comparison of GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD and SFP-GE-S transceiver modules to help you choose the suitable one.

GLC-SX-MM VS GLC-SX-MMD VS GLC-SX-MM-RGD VS SFP-GE-S

Which transceiver module will you choose?

Cisco Transceiver Datasheet

Here are the datasheets of these four different Cisco SFP transceiver modules.

GLC-SX-MM Datasheet

The GLC-SX-MM is programmed to be fully compatible and functional with all intended Cisco 1GB switching devices. This transceiver module operates on ordinary multimode fiber optic link spans of up to 550 meters in length.

Transceiver Module
GLC-SX-MM
Interface
LC duplex
Wavelength
850nm
Tx Power
-9.5 ~ – 3dBm
Receiver Sensitivity
< -17dBm
DOM Support
No
Temperature Range
0 to 70°C (32 to 158°F)
Cable Type
MMF
Price(US dollars)
6.00
GLC-SX-MMD Datasheet

The GLC-SX-MMD 1000BASE transceiver module is made for multimode fiber only. It’s the replacement of GLC-SX-MM which features an enhanced DOM interface. And this SFP fiber transceiver module operates on legacy 50 µm multimode fiber links up to 550 meters.

Transceiver Module
GLC-SX-MMD
Interface
LC duplex
Wavelength
850nm
Tx Power
-9.5 ~ – 3dBm
Receiver Sensitivity
< -17dBm
DOM Support
Yes
Temperature Range
0 to 70°C (32 to 158°F)
Cable Type
MMF
Price(US dollars)
6.00
GLC-SX-MM-RGD Datasheet

The GLC-SX-MM-RGD transceiver module is designed for Industrial Ethernet applications, including factory automation, intelligent transportation system and other deployments in hash environment. Compared with the ordinary transceivers which can endure the temperature ranging from 0 to 70°C,CLC-SX-MM-RGD can survive in the temperature from -40 to 85°C. It can support up to 550 meters of cabling.

Transceiver Module
GLC-SX-MM-RGD
Interface
LC duplex
Wavelength
850nm
Tx Power
-9.5 ~ – 3dBm
Receiver Sensitivity
< -17dBm
DOM Support
Yes
Temperature Range
-40 to 85°C (-40 to 185°F)
Cable Type
MMF
Price(US dollars)
6.00
SFP-GE-S Datasheet

The Cisco SFP-GE-S transceiver provides a high performance and cost-effective small form factor pluggable module for 1000BASE-SX Gigabit Ethernet and 1G Fiber Channel application. It’s designed for short wavelength applications. The max distance for this transceiver module is 550 meters. Besides, it also supports DOM.

Transceiver Module
SFP-GE-S
Interface
LC duplex
Wavelength
850nm
Tx Power
-9.5 ~ – 3dBm
Receiver Sensitivity
< -17dBm
DOM Support
Yes
Temperature Range
0 to 70°C (32 to 158°F)
Cable Type
MMF
Price(US dollars)
6.00

Differences of GLC-SX-MM VS GLC-SX-MMD VS GLC-SX-MM-RGD VS SFP-GE-S

From the above Cisco transceiver datasheet, we have learned that these Cisco transceiver modules share many similarities. All of them can support up to 550 meters over multimode fibers. And they are designed with the same 850m wavelength, Tx power and LC duplex interface. The main difference is the DOM (Digital Optical Monitoring) function and operating temperature.

·DOM function

Except GLC-SX-MM, all the others support DOM. With this function, users can monitor the transceiver module’s parameters in real time like optical input and output power, temperature and so on.

·Operating Temperature

GLC-SX-MM, GLC-SX-MMD and SFP-GE-S can work at the same temperature ranging from 0 to 70°C. But GLC-SX-MM-RGD SFP transceiver can work in a wider operating temperature of -40 to 85°, which is especially suitable for industrial Ethernet switches.

Conclusion

According to the above discussion, we can say GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD and SFP-GE-S transceivers share many similarities. However, please note that the differences still exist, and ensure the transceiver module you choose will be compatible with the existing networking equipment. FS.COM is the one-stop shop to help you get these Cisco transceivers and other networking products that are compatible with the Cisco transceivers. If you have any questions in buying guide, please contact us via sales@fs.com.

Things About Cisco SFP Compatibility Matrix That Wiki Can’t Tell You

Transceiver module is the essential device of a network architecture. As a famous manufacturer of optical products, Cisco published a set of copper SFP transceiver modules to support copper networking. Here focus on Cisco SFP compatibility matrix to present a comprehensive Cisco SFP datasheet for you.

Overview of Cisco Copper SFP Transceiver Module

SFP stands for small form factor pluggable. Copper SFP transceiver is a hot-pluggable transceiver with RJ45 port, so it’s also called SFP RJ45 transceiver. SFP RJ45 transceiver supports 10/100/1000 BASE rate over Cat5 cables. In addition, RJ45 copper transceiver is usually used for transmitting data in a short distance, due to its transmission distance ranging from 10 to 30 meters or from 80 to 100 meters. And Cisco 1G SFP, copper and RJ45 Ethernet cables are much cheaper than the fiber ones, so it’s wise to choose a copper SFP transceiver to make use of the existing cabling system to optimize your network instead of using the fiber cables.

How to Choose A Cisco Copper SFP Transceiver Module

When you decide to buy a copper SFP transceiver, the quality and price matter a lot. But the price between OEM and the third party suppliers varies greatly. If you have plenty of money, you can order one directly from Cisco. If you search for a cost-effective solution, then the third party is a good choice. As for the quality, there are not many differences between Cisco and the third party’s products, because all products must meet the strict standards or MSA (Multisource Agreement). So it’s a wise decision to buy a copper SFP transceiver from a third party. Here I recommend you some copper SFP transceivers from FS.COM, whose transceivers are all tested before shipping.

SFP of Cisco SFP Compatibility Matrix

Figure: Choose a suitable copper SFP transceiver for your network

Cisco GLC-T Compatible 1000BASE-T SFP Transceiver

This GLC-T transceiver is a typical RJ45 transceiver, which is used for Cat5 wiring. The max data rate is 1000Mbps and the max cable distance is 100 meters, which is suitable to connect different switches or routers in a data center. It’s compatible with most Cisco switches and some FS switches like S5800-48F4S Gigabit SFP switch.

Cisco GLC-TA Compatible 10/100/1000BASE-T SFP Transceiver

Similar with GLC-T SFP, but this copper transceiver supports 10/100/1000 auto negotiation. And the operating temperature is different. It is an extended temperature range from -5 to 85°C, while GLC-T is from 0 to 70°C. Furthermore, it also operates on standard Cat5 unshielded twisted-pair copper cabling of link lengths up to 100 meters.

Cisco SFP Compatibility Matrix for GLC-T and GLC-TA

Both GLC-T and GLC-TA are supported on a wide range of Cisco equipment. Here lists some of Cisco network switches compatible with GLC-T and GLC-TA Cisco SFP compatibility matrix.

Switches Support GLC-T and GLC-TA
Cisco ME-2400-24TS-A
Cisco WS-C2940-8TF-S
Cisco ME-3400G-12CS-A
Cisco WS-C2960-24PC-L
Cisco ME-3400G-2CS-A
Cisco WS-C2960-48PST-L
Cisco ME-3400-24FS-A
Cisco WS-C2960G-48TC-L
Cisco 3750 ME-C3750-24TE-M
Cisco WS-C2960S-24TS-S
Cisco ME-3600X-24FS-M (SFP ports)
Cisco 2960S-F48TS-S
Cisco ME-3800X-24FS-M (client ports)
Cisco WS-C2970G-24TS-E
Cisco 4900 ME-4924-10GE
Cisco WS-C2975GS-48PS-L
Cisco 6500 ME-C6524GS-8S
Cisco WS-C3560-24PS
Cisco 2900 WS-C2948G-GE-TX
Cisco WS-C3560G-48TS
More supportable switches, please check Cisco Transceiver Compatibility Matrix.

Besides Cisco switches, GLC-T and GLC-TA can also be used on FS.COM S5800-48F4S switch which is a 48 port SFP L2/L3 MPLS switch with 4 10G SFP+ ports. It is a very cost-effective solution for traditional or fully virtualized data center.

Conclusion

Knowing Cisco SFP compatibility matrix can help us to choose the suitable transceiver and switch quickly. Cisco copper SFP transceiver modules produced by FS.COM can work well with Cisco switches and FS switches. Besides, our Cisco compatible SFPs are the most reliable quality products without high price, and supported by a long time warranty to offer you a great after-sales service. Know more about Cisco copper SFP modules, please visit FS.COM.

What Is QSFP56 and QSFP56-DD Transceiver Module?

Optical transceiver is one of the most important elements in data centers. Currently, QSFP28 transceiver module is the leading product on the market that supports 40 and 100 Gigabit Ethernet application. However, the world is constantly changing and evolving, new applications such as 4K HD video, webcast, VR and cloud computing have driven a sharp growth of network traffic. Therefore, today, QSFP56 and QSFP56-DD are developed to provide 200G or 400G applications, in order to satisfy people’s higher transmission speed.

Introduction of QSFP

In order to have a good understanding of QSFP56 and QSFP56-DD, we’d better know what QSFP is first. QSFP means Quad Small Form-Factor Pluggable, which is a compact, hot-pluggable transceiver. It’s an industry format that is developed and supported by many network component vendors, and it’s widely used to connect network switch, computer, server, video and some other communication systems. QSFP, QSFP56 and QSFP56-DD transceivers share the same package form, but their transmitting rates are different. This has lead to some other differences such as functions and applications, which will be explained in the following parts.

What Is QSFP56 Transceiver Module?

QSFP56 optical transceiver is the solution for 200G applications. It’s a pluggable transceiver module that has the same size as QSFP. However, this 200G transceiver can provide the top data rate of 50Gb/s of each channel. In addition, products of the transceiver will be compatible with previous QSFP standards. Therefore, the data center are able to reuse and easily refresh their systems designs and cost in an effective way. Communication specialists forecast that QSFP56 transceivers may accelerate the upgrade of the next generation network switches that the density of their front panel would be doubled, which will create more network throughput. QSFP56 will be the most competitive product due to its powerful processing capacity.

QSFP56

Figure 1: Example of QSFP56 Transceiver Connection

What Is QSFP56-DD Transceiver Module?

QSFP56-DD refers to a double-density QSFP optical transceiver that supports 200Gbps and 400Gbps Ethernet applications. It’s designed to employ eight lanes that operate up to 25Gb/s NRZ modulation or 50Gb/s PAM4 modulation. This means the new 400Gbps optical transceiver will increase the bandwidth and panel density by several times compared to the similarly sized QSFP transceivers. It’s based on the widely applied QSFP interconnection system, which is particularly suitable in data centers and HPC centers. In addition, this transceiver provides backward compatibility to lower-speed QSFP forms, so that when the technicians need to upgrade their networks to a higher speed, they could continue to use the other existing cabling infrastructure.

qsfp-dd-vs-qsfp

Figure 2: QSFP-DD vs QSFP

Conclusion

Traffic growth for data centers operators and service suppliers requires the adoption of 200G and 400G optical interfaces in the next generation of network devices. QSFP56 and QSFP56-DD transceiver modules are the best innovations to support customers with high speed and reliable connections. With these optical transceivers, technicians are able to achieve a breakthrough in network transmitting capability. We believe that the applications of QSFP56 and QSFP56-DD are the general trend in the future.

Related Article: Global Optical Transceiver Market: Striding to 200G and 400G

A Pair of HP SFP+: J9150A vs J9151A

Today, let’s turn to third-party transceiver modules rather than the original one which we have covered lots of topic about it. Third-party compatible optical module means the optical transceiver is offered by another manufacturer who can provide or produce the optics with the same specifications. For example, HPE J9150A compatible 10GBASE-SR SFP+ provided by FS.COM has the same specification with the original one produced by HP. The following part will mainly focus on the X132 10G SFP+ LC transceivers, especially J9150A vs J9151A.

J9150A: HP X132 10G SFP+ LC SR Transceiver

HP X132 10G SFP+ LC SR Transceiver is a 10-Gigabit transceiver in SFP+ form-factor. 10GBase-SR is one of the Ethernet specifications. HP X132 10G SFP+ LC SR transceiver complies with this standard specification, and the SR in this optical module model means short range. When it is integrated with multimode fiber, its transmission distance can reach up to 300 m. In addition, the wavelength of the 10G SFP+ SR optical module is 850 nm, which has the advantages of low cost, low power consumption, small size, and high density. In its name, HP is just a trademark of Hewlett-Packard Development Company. This kind of transceiver module is same with other normal 10G SFP+ SR transceivers in specification and function.

J9150A

J9151A: HP X132 10G SFP+ LC LR Transceiver

Same with HP X132 10G SFP+ LC SR transceiver, HP X132 10G SFP+ LC LR transceiver is also a 10-Gigabit transceiver in SFP+ form-factor, but it conforms to 10GBase-LR Ethernet specification. Oppositely, LR stands for the long range. The transceiver supports the 10-Gigabit LR standard, providing 10-Gigabit connectivity up to 10 km on single-mode fiber. Its maximum transmission distance is 10 km on a single-mode optical fiber with a wavelength of 1310nm. It can actually reach a maximum of 25km. Moreover, It also has the advantages of miniaturization, low power consumption, and long transmission distance.

J9151A

J9150A vs J9151A

SFP+ Module J9150A J9151A
Wavelength 850nm 1310nm
Cable Length 2m to 300m 2m to 10km
Fiber Type Multimode Single Mode
Connector Type LC LC
Transceiver Form Factor SFP+ SFP+

Wavelength means the distance between two crests of the transmission signal. The longer wavelength means a longer transmission distance. As wavelength and fiber type are both the determining factor of transmission distance, we can say the biggest difference between J9150A and J9151A is the transmission distance.

Conclusion

From the above, we can conclude that the content of J9150A vs J9151A is not falling on which one is better, instead, it mainly argues the optimized choice in varied conditions. Except for the prefix—HP, these two transceivers are similar to a lot of 10G SFP+ with an LC connector. Whereas, due to the name—HP, the transceivers can be trustworthy and chosen by many people. The fact that HP SFP+ transceivers are widely acknowledged by the public encourages more manufacturer to produce them. These 10 Gigabit single-mode SFP+ and 10 Gigabit multimode SFP+ provided by FS.COM are engineered to the highest quality standards and are 100% HP compatible. Next time, we may cover the two other types of X132 10G SFP+ LC transceivers, that is HP X132 10G SFP+ LC LRM transceiver(J9152A) and HP X132 10G SFP+ LC ER transceiver (J9153A). Follow us, if you are interested in it.

Related Article: Three Popular 10GBASE-SR SFP+ Modules Introduction

What’s the Difference: FET-10G vs SFP-10G-SR

You must be puzzled by the two different short reach optical transceivers for a long time: FET-10G and SFP-10G-SR. What’s their differences? Does the connection work if we connect Cisco Nexus switches with FET-10G on one end and SFP-10G-SR on the other end? With these questions in mind, I’d like to invite you to keep reading the article.

FET-10G vs SFP-10G-SR Difference

FET-10G vs. SFP-10G-SR are Cisco brand for building short network. FET is short for “Fabric Extender”. Just as its name implies, this module can only support fabric links from a Nexus 2000 to a Cisco parent switch. Fabric Extender transceiver can support link lengths up to 100m over OM3 or OM4 multimode fiber cable. SFP-10G-SR transceiver supports link lengths of 26m on standard fiber distributed data interface-grade multimode fiber cable. The link lengths can reach up to 300m over OM3 fiber cable and 400m over OM4 fiber optic jumpers. You can learn some small differences from the following table.

SFP+ Wavelength(nm) Cable Type Interface Modal Bandwidth(MHz km) Max Cable Distance (m)
FET-10G 850 MMF Duplex LC 500 (OM2)

2000 (OM3)

4700 (OM4)

25

100

100

SFP-10G-SR 850 MMF Duplex LC 160

200 (OM1)

400

500 (OM2)

2000 (OM3)

4700 (OM4)

26

33

66

82

300

400

Can We Connect FET-10G With SFP-10G-SR

In Cisco Nexus switch, do the transceivers have t ends in order for the connection to work? Does FET module have to be linked with another FET module? Now there is a FET-10G module in Cisco Nexus 2000 series fabric extender and SFP-10G-SR in a Nexus 5000 series switch. Can this connection work normally? Before making a judgement, let’s first compare the power of FET-10G and SFP-10G-SR.

SFP+ Module Transmit Power (dBm) Receive Power (dBm)
Max. Min. Max. Min.
FET-10G -1.3 -8 -1 -9.9
SFP-10G-SR -1.2 -7.3 -1.0 -9.9

From the above chart, transmit power and receiver power are different. And it has mentioned before that FET-10G vs. SFP-10G-SR support different network distance over the same fiber cable. Therefore, we can get a conclusion that FET-10G transceiver have to be connected with another FET-10G module. If we build a connection with SFP-10G-SR into the Nexus 5000 and FET-10G in Nexus 2000, it won’t work.

For better connection, when using FET-10G fabric extender transceiver, you should follow these rules:
1. FET-10G only supports fabric links, for instance, fabric links from a Nexus 2000 series to a Cisco parent switch.
2. Cisco fabric extender transceiver must be connected to another fabric extender transceiver, FET-10G to FET-10G.
3. FET-10G can be used for Nexus Cisco 2200 uplinks.
4. FET-10G can support fabric links on Cisco 5000, 6000, 7000 series switch.

Can We Replace FET-10G with SFP-10G-SR Modules?

FET-10G transceiver is designed to connect Cisco Nuplink ports (fabric interfaces) with the upstream parent Cisco Nexus switch. We already know that we can’t intermix FET-10G with SFP-10G-SR modules. How about plugging SFP-10G-SR transceivers into the fabric ports to connect Cisco Nexus switches? That is to say, can we replace FET-10G with SFP-10G-SR?

The answer is yes. However, it’s more expensive compared with original Cisco SFP-10G-SR transceiver. FET-10G is to provide an uplink to a Fabric Extender and save you money. If you already have them, then use them. If you making a purchasing decision, buy the FET-10G or third-party SFP-10G-SR.

FET-10G vs. SFP-10G-SR

Conclusion

From this article, you can find FET-10G vs SFP-1T-10G is specially designed for Cisco Nexus series switches. To make sure the right connection, bear in mind that use the sane transceivers on both sides, either FET or 10G-SR. You can replace FET-10G with SFP-10G-SR while you can’t do that in turn.

Related Article: Cisco SFP-10G-SR: All You Need to Know

DWDM Tunable SFP+ VS. DWDM Fixed Wavelength SFP+ Transceiver

Dense wavelength division multiplexing (DWDM) is one of the most important technologies to increase network transmission capacity. Early DWDM systems applied fixed wavelength DWDM SFP+ transceivers and performance is good. However, as the demand for great traffic capacity keeps growing, more optical transceivers of different wavelengths are needed, leading to high cost. So how to deal with that? DWDM Tunable SFP+ arises your attention.

Tunable-SFP+

What Is DWDM Tunable SFP+

Conventional DWDM SFP+ transceivers use fixed-wavelength lasers as light sources. It means that many optical transceivers are needed for the wavelength channels in a DWDM system. While DWDM tunable SFP+ is different from fixed wavelengths modules because it applies tunable laser, which can operate at any channel wavelength, means that only one kind of transceiver is needed. Tunable lasers are now widely used as light sources in DWDM systems. Tunable SFP+ modules are only available in DWDM since CWDM grid is too wide. DWDM Tunable SFP+ optics are for the C-Band 50GHz. About 88 different channels can be set with intervals of 0.4nm, which is the 50GHz band.

For better understanding, I’ll show you a DWDM tunable SFP+ module. This is a Cisco Compatible 10G DWDM C-band tunable SFP+ 50GHz Transceiver. It’s hot swappable, can support 10.3Gbps data rate up to the distance of 80km over single mode LC fiber cable. Support 1563.86nm-1528.77nm C-band tunable wavelengths.

cisco DWDM tunable SFP+

What you should note is that wavelengths of  DWDM tunable SFP+ can be tuned only when your Cisco/Juniper/Arista/etc switch supports. If your switch only supports common fixed-wavelength DWDM SFP+, you need external software to change tunable optics into certain wavelength before putting into use.

Why DWDM Tunable SFP+ Is Better Than Fixed Wavelength SFP+?

Fixed wavelength SFP+ are still in the market and not too many problems found in use. So you may feel puzzled about choosing DWDM tunable SFP+ or fixed wavelength SFP+ as tunable SFP+ is more expensive. The following will tell you why you need tunable optics.

First, save you cost. With the development of optical communication systems, the shortages of fixed-wavelength laser gradually revealed. Conventional DWDM SFP+ can lead high costs. The number of wavelengths in DWDM 50GHz has reached the hundreds. Then spare modules of each laser should be prepared for protection of the system because you don’t know which module will break down and it’s difficult to predict the number of stock in specific channels. Therefore you have to buy large quantity of DWDM SFP+ modules with fixed wavelengths. While the tunable optics are configured with different DWDM wavelengths in one module. You can select the right wavelength you need based on your optical fiber communication environment. DWDM Tunable SFP+ are typically used as “spare-optics” to save you cost.

Second, flexible network management. When running a DWDM network with lots of nodes, for instance, up to 80 different wavelengths, management could be a nightmare. You have to prepare couple of DWDM SFP+ optics of each wavelength and possibly in different locations. Field engineers may not access network nodes as quickly as you wish. Thus DWDM tunable optics would be a good choice. Tunable optics could be configured for a specific wavelength to support bandwidth changes as needed in the optical network.

Third, suitable for large network capacity. As the development of increasing network transport, 400G or 1T would be the trend. Then 400G and 1T transmission formats are expected to be bulky and not fit within 50GHz spacing. These future new data rate formats require that channel spacing is flexible, that your OTN system can adapt to new rates and can re-arrange channel spacing to find place for new rates in it. DWDM Tunable optics will double the number of channels supported in this transceiver module. Upgrading to 50GHz channel spacing doubles the capacity potential in Enterprise and Metro networks.

Choose DWDM Tunable SFP+ in the Long Run

DWDM Tunable SFP+ are high-performance optics which can be tuned to the appropriate wavelength in seconds. The ability to function on various wavelengths has set these optics apart from fixed-wavelength DWDM SFP+. DWDM Tunable SFP+ will become popular among DWDM systems due to their ease of spare use and flexibility. Tunable SFP+ would be a powerful and invaluable transmission tool in high-speed network. At present, many engineers are using fixed wavelengths SFP+ transceivers. Some may be stopped by the DWDM tunable SFP+ price. But in the long run, you are suggested to consider tunable SFP+.

Related Articles:

Wavelength Switching Solution: Tunable XFP Transceiver

Why Use Tunable DWDM SFP+ Transceivers?

Getting to Know About DWDM Tunable Transceiver

Transceiver Solutions for Cisco Catalyst 9300 Series Switch

This year, Cisco unveiled the Catalyst 9000 family, shaping the new era of intent-based networking. The Network. Intuitive. The Cisco Catalyst 9000 Series switches are the next generation of enterprise-class switches built for security, Internet of Things (IoT), mobility, and cloud. The Cisco Catalyst 9000 Series switches come in three main varieties: The Catalyst 9300, the Catalyst 9400 and the Catalyst 9500. Here, the post will give an emphasis on Cisco Catalyst 9400 series switches and transceiver solution for them.

Overview of Cisco Catalyst 9300

The Catalyst 9300 Series is the next generation of the industry’s most widely deployed stackable switching platform. Built for security, IoT, and the cloud, these network switches form the foundation for Cisco’s Software-Defined Access, the leading enterprise architecture. In addition, the Cisco Catalyst 9300-based models support a variety of uplink modules for both copper and fiber uplink support. These models add even more flexibility to the interface choices that you can make in a single Cisco Catalyst 9300 Switch or in a stack of Cisco Catalyst 9300 Switches.

cisco catalyst 9300

Supported Transceiver Modules for Cisco Catalyst 9300

The Cisco Catalyst 9300 Series Switches support optional network modules for uplink ports. All modules are supported across all 9300 platforms:

  • 4 x 1 Gigabit Ethernet network module
  • 4 x 1, 2.5, 5, or 10 Gigabit Ethernet network module
  • 8 x 10 Gigabit Ethernet network module
  • 2 x 40 Gigabit Ethernet network module

100G Solution

Model Number Transceiver Description Interface Max Cable Distance
CFP-100G-SR10 100GBASE-SR10 CFP form factor transceiver module for multi mode fiber, short wavelength over 10 lanes, in the 850-nm wavelength window MTP/MPO-24 Up to 100m on OM3/<150m on OM4
CFP-100G-LR4 100GBASE-LR4 CFP form factor transceiver module for SMF, 4 LAN-WDM lanes in the 1310-nm wavelength window LC duplex 10km
CFP-100G-ER4 100GBASE-ER4 CFP form factor transceiver module for SMF, 4 LAN-WDM lanes in the 1310-nm wavelength window LC duplex 40km
QSFP-100G-SR4-S 100GBASE-SR4 QSFP form factor transceiver module for multi mode fiber, short wavelength over 4 lanes, in the 850-nm wavelength window LC duplex 100m
QSFP-100G-CWDM4-S 100GBASE CWDM4 QSFP form factor Transceiver for single mode fiber, 4 CWDM-WDM lanes in the 12761-1331-nm wavelength window LC duplex 2km
QSFP-100G-PSM4-S 100GBASE PSM4 QSFP form factor transceiver module for single mode fiber, short wavelength over 4 lanes, in the 1195-1325-nm wavelength window MTP/MPO-12 500m
QSFP-100G-LR4-S 100GBASE-LR4 QSFP form factor transceiver module for SMF, 4 LAN-WDM lanes in the 1310-nm wavelength window LC duplex 10km

40G Solution

Model Number Transceiver Description Interface Max Cable Distance
QSFP-40G-SR4 40GBASE-SR4 QSFP+ transceiver module for MMF, 4-lanes, 850-nm wavelength MTP/MPO 150m on OM4
QSFP-40G-CSR4 40GBASE-CSR4 QSFP+ transceiver module for MMF, 4-lanes, 850-nm wavelength MTP/MPO 400m on OM4
QSFP-40G-SR4-S 40GBASE-SR4 QSFP+ transceiver module for MMF, 4-lanes, 850-nm wavelength MTP/MPO 150m on OM4
QSFP-40G-SR-BD 40G QSFP Bi-Directional transceiver module for duplex MMF LC duplex 150m on OM4/100m on OM3/30m on OM2
QSFP-40G-ER4 40GBASE-LR4 QSFP40G transceiver module for Single Mode Fiber, 4 CWDM lanes in 1310nm window Muxed inside module LC duplex 40km
QSFP-40GE-LR4 100GBASE-LR4 QSFP form factor transceiver module for SMF, 4 LAN-WDM lanes in the 1310-nm wavelength window LC duplex 10km
WSP-Q40GLR4L 40GBASE-LR4 QSFP40G transceiver module for Single Mode Fiber, 4 CWDM lanes in 1310nm window Muxed inside module LC duplex 2km

25G Solution

Model Number Transceiver Description Connector Type Cable Type
SFP-H25G-CU1M 25G Copper Cable 1-meter SFP28 to SFP28 Passive Copper Cable
SFP-H25G-CU2M 25G Copper Cable 2-meter SFP28 to SFP28 Passive Copper Cable
SFP-H25G-CU3M 25G Copper Cable 3-meter SFP28 to SFP28 Passive Copper Cable
SFP-H25G-CU5M 25G Copper Cable 2-mete SFP28 to SFP28 Passive Copper Cable
SFP-25G-SR-S 25GBASE-SR SFP+ transceiver module for MMF, 850-nm wavelength LC duplex MMF

10G Solution

Model Number Transceiver Description Interface Max Cable Distance
SFP-10G-SR 10GBASE-SR SFP+ transceiver module for MMF, 850-nm wavelength LC duplex 300m over OM3
SFP-10G-SR-S 10GBASE-SR SFP+ transceiver module for MMF, 850-nm wavelength LC duplex 300m over OM3
SFP-10G-SR-X 10GBASE-LRM SFP+ transceiver module for MMF and SMF, 1310-nm wavelength LC duplex 300m over OM3
SFP-10G-LRM 10GBASE-LRM SFP+ transceiver module for MMF and SMF, 1310-nm wavelength LC duplex 220m
SFP-10G-LR 10GBASE-LR SFP+ transceiver module for SMF, 1310-nm wavelength LC duplex 10km
SFP-10G-LR-S 10GBASE-LR SFP+ transceiver module for SMF, 1310-nm wavelength LC duplex 10km
SFP-10G-LR-X 10GBASE-LR SFP+ transceiver module for SMF, 1310-nm wavelength LC duplex 10km
SFP-10G-ER-S 10GBASE-ER SFP+ transceiver module for SMF, 1550-nm LC duplex 40km
SFP-10G-ZR 10GBASE-ZR SFP+ transceiver module for SMF, 1550-nm LC duplex 80km
SFP-10G-BX40D-I 10G SFP+ Bidirectional for 40km, downstream LC duplex 40km
SFP-10G-BX40U-I 10G SFP+ Bidirectional for 40km, upstream LC duplex 40km
DWDM-SFP10G-49.32 10GBASE-DWDM 1549.32 nm SFP+ (100-GHz ITU grid) LC duplex 40km
DWDM-SFP10G-60.61 10GBASE-DWDM 1560.61 nm SFP+ (100-GHz ITU grid) LC duplex 40km
CWDM-SFP10G-1470 CWDM 1470 nm SFP+ 10 Gigabit Ethernet Transceiver Module LC duplex 20km
CWDM-SFP10G-1490 CWDM 1490 nm SFP+ 10 Gigabit Ethernet Transceiver Module LC duplex 20km
XENPAK-10GB-ER 10GBASE-ER XENPAK transceiver module for SMF, 1550-nm wavelength SC duplex 40km
XENPAK-10GB-LR 10GBASE-LR XENPAK transceiver module for SMF, 1310-nm wavelength SC duplex 10km
X2-10GB-LR 10GBASE-LR X2 transceiver module for SMF, 1310-nm wavelength SC duplex 10km
X2-10GB-SR 10GBASE-SR X2 transceiver module for MMF, 850-nm wavelength SC duplex 300m over OM3 MMF
XFP-10GLR-OC192SR Cisco multirate XFP transceiver module for 10GBASE-LR Ethernet and OC-192/STM-64 short-reach (SR-1) Packet-over-SONET/SDH (POS) applications,SMF LC duplex 10km
XFP-10GER-OC192IR Cisco multirate XFP transceiver module for 10GBASE-ER Ethernet and OC-192/STM-64 intermediate-reach (IR-2) Packet-over-SONET/SDH (POS) applications, SMF LC duplex 40km

Conclusion

Digital disruption is changing how we think about our networks. Whether customers or employees, the “experience” has become a strategic imperative. The Cisco Catalyst 9300 Series fixed access switches are designed to help you change your network from a platform of connectivity to a platform of services. If you are in need of compatible optical transceivers for Catalyst 9300, give FS.COM a shot. FS.COM provides a wide range of supported optical transceivers for Cisco Catalyst 9300 series switch. Each one of them has been tested with assured 100% compatibility to them.

Related Article: Cisco Catalyst 3750 Series Switches SFP Port Connections

What Kind of SFP Fiber Cable Should I Choose?

Gigabit Ethernet has supplanted Fast Ethernet in wired local networks and becomes ubiquitous throughout the world, serving as one of the most prevalent enterprise communication standard. The Gigabit Ethernet standard supports a maximum data rate of 1 gigabit per second (Gbps)(1000 Mbps), 10 times faster than Fast Ethernet, yet is compatible with existing Ethernet. To link your switches and routers to a Gigabit Ethernet network, you need a Gigabit Ethernet transceiver module as a transmission medium. This article intends to introduce the most commonly used one—SFP transceivers. What kind of SFP fiber cable should I choose for my SFP?

SFP Fiber Cable

What Is SFP Transceiver?

SFP, short for small form-factor pluggable is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. SFP transceiver can be regarded as the upgrade version of GBIC module. Unlike GBIC with SC fiber optic interface, SFP module is with LC interface and the main body size of SFP is only about half of GBIC so that it can save more space. SFP interfaces a network device mother board (for a router, switch, media converter or similar devices) to a fiber optic or copper networking cable. It is designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards.

Types & Applications of SFP transceivers

SFP transceivers are available with various transmitter and receiver types, which facilitates users to select the appropriate optical transceiver for different optical reach and optical fiber type (single-mode fiber or multimode fiber) required by different link. SFP transceiver modules can be divided into several different categories:

Types Transmission Medium Wavelength Distance
1000BASE-T SFP Twisted-pair cabling / 100 m
1000BASE-SX SFP Multimode fiber 770-860 nm OM1-275 m/OM2-550 m
1000BASE-LX/LH SFP SMF & MMF 1270-1355 nm MMF-550 m/SMF-5 km
1000BASE-ZX SFP Single mode fiber 1550 nm 70 km
1000BASE-EX SFP Single mode fiber 1310 nm 40 km
1000BASE-BX10 SFP Single mode fiber 1480-1500 nm downstream, 1260-1,360 nm upstream 10 km
CWDM and DWDM SFP Single optical fiber various wavelengths various maximum distances

SFP transceivers are found in Ethernet switches, routers, firewalls and network interface cards. Storage interface cards, also called HBAs or Fibre Channel storage switches, also make use of these modules. Because of their low cost, low profile, and ability to provide a connection to different types of optical fiber, SFP transceiver provides such equipment with enhanced flexibility.

FS.COM Compatible SFP Transceivers for Popular Switches

FS.COM offers a full range of SFP transceivers compatible with major brands, such as Cisco, Juniper, Arista, Brocade, HPE, etc. All of these cost-effective compatible SFPs have been strictly tested to make sure 100% compatibility. The table below listed a small part of compatible SFPs supported on major branded switches.

Brand Switch Series Model Port Description
Cisco Catalyst 6500 Series WS-SUP720-3BXL 2 SFP Port
VS-S720-10G-3C 4 SFP Port
WS-X6724-SFP 24 SFP Port
Nexus 9000 Series N9K-C9396PX 48 SFP Port
IE3010 Series IE-3010-24TC 2 SFP Port
ASR 9000 Series Router A9K-MPA-20X1GE 20 SFP Port
Juniper EX 4200 Series EX4200-24T 2 SFP Port
EX4200-48T 4 SFP Port
EX4200-24T-DC 2 SFP Port
MX480 Router MX480 Router 4 SFP Port
SRX Series SRX210 1 SFP Port (Option)
QFX 5100 QFX5100-48S 48 SFP Port
Arista 7500 Series DCS-7504 48 SFP Port (Option)
DCS-7508 48 SFP Port (Option)
7050SX Series 7050SX-64 48 SFP Port
7100 Series DCS-7124S 24 SFP Port
Brocade VDX 6720 BR-VDX6720-16-R 16 SFP Port
BR-VDX6720-24-F 24 SFP Port
BR-VDX6720-40-F 40 SFP Port
SX Series SX-424F 24 SFP Port
SX-FI12GM-4-PREM 12 SFP Port
Brocade BI-RX-8 NI-MLX-1Gx20-SFP 20 SFP Port
HPE ProCurve 5400zl Series J8697A 2 SFP Port
J9548A 144 SFP Port
FlexFabric 5800 Series JC101B 4 SFP Port
JG225B 6 SFP Port
5400R zl2 Series J9584A 24 SFP Port
StorageWorks edge 2/12 348406-B21 12 SFP Port

FS.COM SFP Fiber Cable Solutions

FS.COM offers comprehensive SFP fiber cables for common and special types of SFPs, including singlemode & multimode, simplex & duplex, UPC & APC, lengths from 1 meter to 30 meters in large stocks. We also provides Cat 5e patch cables for 10/100/1000BASE-T SFPs.

Fiber Mode Connector Jacket
9/125 SMF LC Duplex PVC/LSZH/OFNP
9/125 SMF LC Simplex PVC/LSZH
9/125 SMF SC Simplex PVC/LSZH
50/125 OM2 LC Duplex PVC/LSZH
62.5/125 OM1 LC Duplex PVC
Cat5e Patch Cables Max Distance Data Rate
Unshielded (UTP) 100m 1000Mbps
Shielded (FTP) 100m 1000Mbps

Summary

This article offers switch and SFP fiber cable solution for SFP transceivers. Besides the major brands mentioned above, we also provide SFP transceivers compatible with other brands, such as Dell, Extreme, H3C, Huawei, Intel, IBM, Netgear, Ciena, D-Link, Avago, and so on. As to special requirements, please contact Sales@fs.com for suggestion.

Related Article:What Is SFP Port of Gigabit Switch?