Category Archives: SFP Transceiver

What Is QSFP Connector, QSFP+ Connector and QSFP28 Connector?

Nowadays, fibre optic technology shows its unsurpassable advantage in telecommunication. Hence, optical transceiver modules are widely used in data centre and other situations. When it comes to various types of data rate and interface of optical transceivers, there are lots of abbreviations to clarify. This article focuses on the introduction of QSFP connector, QSFP+ connector and QSFP28 connector. They share the same small form factor, but differ in supporting data rate and breakout connection.

QSFP Connector

QSFP is the abbreviation of Quad (4 channel) Small Form Factor Pluggable. Supporting Fibre Channel, Infiniband, Ethernet, Sonet/SDH and other proprietary interconnects, QSFP connector is a hot-pluggable, compact transceiver available for use in singlemode and multimode applications. QSFP transceiver can also support 4 independent channels which can transmit individually at the data rate up to 1.25Gbp/s and the aggregate speed of the 4 channels up to 4.3Gbp/s. For using 4x1G lanes, QSFP connector was only found in some FC/IB contexts.

QSFP+ Connector

Short for Quad Small Form Factor Pluggable Plus, QSFP+ connector is regarded as the enhanced generation of QSFP connector. Why do we call QSFP+ the plus one? Because it can support Infiniband, Fibre Channel and Ethernet at 10Gbp/s per channel, thus the combined data rate of the 4 channels can reach 40Gbp/s, which is a distinct improvement in data transmission speed. Besides, like QSFP connector, 40G QSFP+ interface can support transmission and network link over both singlemode and multimode infrastructures. To enable 40G QSFP+ connector to be splitted into 4 independent data streams for different network equipment, AOC breakout cable, DAC breakout cable and other types of breakout cables are used. Besides, the main types of QSFP+ connector include QSFP+ SR4, QSFP+ PLRL4, QSFP+ LR4 and OTU3, QSFP+ CSR4, QSFP+ UNIV, QSFP+ LR4L, QSFP+ SR Bi-Directional, QSFP+ PLR4, QSFP+ER4 and OTU3.

qsfp connector

QSFP28 Connector

With the same quad based interface as QSFP and QSFP+ connector, QSFP28 fibre optic transceiver can transmit optical signals at 100Gbp/s. Each channel of QSFP28 connector can transmit individually at the data rate up to 28Gbp/s. Outstripping CFP, CFP2 and CFP4 connectors, QSFP28 connector has become the preferred solution of 100G network upgrade for its high flexibility and smaller form type. The flexibility of QSFP28 allows it to be used in several kinds of combination, including 100Gbp/s, 2x50Gbp/s and 4x25Gbp/s. Like QSFP+ connector, depending on the application, there are different options of breakout cable to consider, such as AOC breakout cable, DAC breakout cable and other types of breakout cables. Besides, there is an important note, that a QSFP28 connector can’t be broken down into 10Gbp/s channels. However, QSFP28 is backward compatible, so when it is used in a QSFP+ port , it would allow a breakdown into 4x10Gbp/s SFP+ channels. Lastly, there are several types of QSFP28 connector: QSFP28 SR4, QSFP28 PSM4, QSFP28 CWDM4 and QSFP28 LR4.

qsfp28

Conclusion

QSFP, QSFP+ and QSFP28 connectors are introduced in this article from the aspects of form factor, supporting data rate, breakout connection and types. With the above information, it would be easier for you to choose QSFP, QSFP+ and QSFP28 connectors. QSFP connectors are often used in 4x1G lane. While QSFP+ connectors are mostly used in 40G lane, and QSFP28 connectors are mainly used in 100G lane. Besides, QSFP+ and QSFP28 can be splitted into several streams by using breakout cables. ALL in all, your choice need to depend on your network situation and requirement. If you need a little more help and advice with any of QSFP optics or fibre connectivity cables, then please do not hesitate to let us know. For purchasing high quality QSFP, QSFP+, QSFP28 connectors and QSFP cables with low cost or for more products’ information, please contact us at 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 metres or from 80 to 100 metres. And Cisco 1G SFP, copper and RJ45 Ethernet cables are much cheaper than the fibre ones, so it’s wise to choose a copper SFP transceiver to make use of the existing cabling system to optimise your network instead of using the fibre 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 metres, which is suitable to connect different switches or routers in a data centre. 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 metres.

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 virtualised data centre.

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.

Which One to Select, GLC-LH-SM Vs GLC-LH-SMD?

Among so many different Cisco SFP modules, sometimes you may feel confused. Because the differences of some SFP modules are tiny, for instance, Cisco SFP GLC-LH-SM and Cisco SFP GLC-LH-SMD. If you can’t understand the the difference between these two Cisco SFP modules, you don’t know which one to select for your Cisco switch. This article is gonna explain GLC-LH-SM vs GLC-LH-SMD.

Cisco SFP GLC-LH-SM

Cisco SFP GLC-LH-SM is a hot swappable transceiver module that transfers the data rate of 1 Gbps. It’s compliant with IEEE 802.3 1000BASE-LX/LH standard. It supports the link lengths up to 10 km over single mode fibre patch lead at a wavelength of 1310 nm. It can be also applied for short network connection over multimode fibre cable (550 m).
Other features:
Interface: LC duplex
Tx power: -9.5 ~ -3dBm
Receiver Sensitivity < -23dBm
Commercial Temperature Range: 0 to 70°C (32 to 158°F)
DOM Support: No

Cisco SFP GLC-LH-SM

Cisco SFP GLC-LH-SMD

Cisco SFP GLC-LH-SMD is a hot pluggable transceiver module running the data rate at 1 Gbps. This SFP is interfaced with 1000BASE-LX/LH ports. And it can support both single mode and multimode applications.
Other features:
Interface: LC duplex
Tx power: -9.5 ~ -3dBm
Receiver Sensitivity < -23dBm
Commercial Temperature Range: 0 to 70°C (32 to 158°F)
DOM Support: Yes

GLC-LH-SM vs. GLC-LH-SMD Similarities

Cisco SFP GLC-LH-SM and Cisco SFP GLC-LH-SMD are both used for 1Gbps Ethernet network. They support with IEEE 802.3 1000BASE-LX/LH standard and are compatible with each other. The two Cisco SFP modules can be connected with single mode and multimode LC fibre patch lead. If one switch supports Cisco SFP GLC-LH-SM, then it can also support Cisco SFP GLC-LH-SMD. Here are supported switches for these two Cisco SFP modules: Catalyst Express 500, Catalyst Express 520, Cisco ME 3400, Cisco ME 4900 series, Cisco ME 6500 series, Catalyst 2940 series, Catalyst 2950 series, Catalyst 2960 series, Catalyst 2960 S series, Catalyst 2970 series, Catalyst 3560 series, Catalyst 3560 E series, Catalyst 3560-X series, Catalyst 3750 series, Catalyst 3750-E series, Catalyst 3750-X series, Catalyst 4500series, Catalyst 4900 series, Catalyst 6500 series, cisco IE3010 series.

GLC-LH-SM vs. GLC-LH-SMD Differences

The difference between Cisco SFP GLC-LH-SM and Cisco SFP GLC-LH-SMD is that Cisco SFP GLC-LH-SMD has additional letter “D”. What does “D” mean?

There are two kinds of misunderstanding about “D”. Some think “D” represent “duplex”. Cisco SFP GLC-LH-SMD supports duplex interface. But Cisco SFP GLC-LH-SM should be connected with duplex LC patch cable. And nearly all SFP transceiver modules, except copper SFPs, are interfaced with duplex ports. So this understanding is obvious wrong. Some think that “D” means “ruggged”. This opinion is not true either. “Rugged” is abbreviated to “RGD”, for example, Cisco GLC-LX-SM-RGD Compatible 1000BASE-LX/LH SFP 1310nm 10km DOM Transceiver.

“D” of GLC-LH-SMD transceiver has additional support for Digital Optical Monitoring (DOM) capability. From the features stated above, Cisco SFP GLC-LH-SMD can support DOM function while Cisco SFP GLC-LH-SM can’t. DOM provides a diagnostic monitoring interface for optical transceiver modules. DOM supports monitoring of optic output power, optic input power, temperature, laser bias current, and transceiver voltage. When DOM is enabled, the system monitors the temperature and signal power levels for the optical transceiver modules in the specified ports. Console messages and syslog messages are sent when optical operating conditions fall below or rise above the SFP manufacturer-recommended thresholds.

Which to Select, GLC-LH-SM vs. GLC-LH-SMD?

Cisco SFP GLC-LH-SM and Cisco SFP GLC-LH-SMD are very similar and compatible with each other. The only difference is that the latter one has DOM function. SFP with DOM is better for transceiver and system protection. So you are suggested to select Cisco SFP GLC-LH-SMD. Except these two Cisco SFPS, you can find other Cisco compatible SFPs from FS.COM. For more information, please visit out site http://www.fs.com.

Related Articles: 

A Quick Overview of Cisco GLC-LH-SM SFP Module

GLC-LH-SM vs SFP-GE-L: What’s the Difference?

Why not Use Third-party Fibre Transceivers for Ubiquiti Switches?

Ubiquiti is famous for its switches such as Edge Switch, Edge Router, UniFi switch. Last year, this manufacturer officially released its own SFP and SFP+ fibre optic transceivers which are compatible with their switches. At the same time, it’s said that fibre transceivers from some fibre optic transceiver manufacturers such as Fiberstore can support Ubiquiti switches. This article will discuss what kind of third-party fibre transceivers are compatible with Ubiquiti switches and which fibre optic transceiver manufacturers is the most reliable.

Ubiquiti Fibre Transceivers

Ubiquiti switches are specially designed for 1G and 10G network. They didn’t produce their own fibre transceivers until last year. They only provide a small amount of single mode and multimode fibre transceivers. UF-MM-1G and UF-SM-1G-S are designed for SFP ports on Ubiquiti switches. And fibre transceivers like UF-MM-10G, UF-SM-10G, UF-SM-10G-S are for Ubiquiti switches’ SFP+ ports.

Third-party Fibre Transceivers For Ubiquiti Switches

Except their own SFP or SFP+ transceivers, those from other fibre optic transceiver manufacturers like Cisco, Dell, HP, Finisar, Brocade have been tested to be compatible with Ubiquiti switches by some users. Cisco, the world famous fibre optic transceiver manufacturer, has seven SFPs supporting Ubiquiti switches, Cisco GLC-LH-SM 30-1299-01 SFP, Cisco GLC-SX-MM, Cisco GLC-SX-MM 1000BASE-SX SFP, Cisco SFP-H10GB-CU1M, Cisco MGBSX1 Gigabit SX Mini-GBIC SFP Transceiver and Cisco GLC-T. Besides, for 10G network, Cisco SFP-10G-SR can be plugged in SFP+ ports on their switches.

Fiberstore Fibre Transceivers For Ubiquiti Switches

Fiberstore also has a wide variety of SFP and SFP+ transceivers compatible for Ubiquiti switches. Users have recommended some SFPs and SFP+s from Fiberstore, for instance, SFP1G-LX-31 1310nm (single mode SFPs), SFP-1G85-5M (multi-mode), SFP-GB-GE-T Module, SFP-10G85-3M (multi-mode).

Comparison Between Ubiquiti and Fiberstore Fibre Transceiver

There are so many third-party transceiver manufacturers providing compatible fibre transceivers fro Ubiquiti switches. But which fibre transceiver supplier should you choose? The answer is Fiberstore. Now let’s see why Fiberstore is more advantageous by comparing Ubiquiti with Fiberstore fibre transceiver.

    • Fibre Transceiver Category—Ubiquiti has only one single mode SFP and one multimode SFP. As to SFP+ transceivers, there only two single mode modules and one multimode module. The fibre transceiver category is very limited. While users have plenty of choices for SFPs and SFP+s from Fiberstore. As mentioned above, Ubiquiti switches support some fibre transceivers from third-party fibre optic transceiver manufacturers. Fiberstore offers many compatible brands like Cisco, Dell, HP, Finisar, Brocade, etc. Those SFPs and SFP+s have been tested to be suitable for Ubiquiti switches.
    • Fibre Transceiver Quality—Some fibre optic transceiver manufacturers produce SFP and SFP+ transceivers with low price. However, the quality of those fibre transceivers can’t be assured. In our test centre, we have switches from Cisco, Dell, Extreme, Juniper and other famous brands. Every fibre transceiver offered by Fiberstore before shipping has to go through strict test to assure 100% compatibility and high performance.

fs fiber transceiver

    • Fibre Transceiver Price—Except fibre transceiver quality, fibre transceiver price is another important factor to be considered. Compare fibre transceiver price of Fiberstore with that of other fibre optic transceiver manufacturers, it’s obvious that Fiberstore has more advantages. That’s one of the reasons why Fiberstore wins popularity among customers. You can check the following screenshots about the feedback from customers.


customer review2

Conclusion

If you have to purchase fibre transceiver for your Ubiquiti switches, you can get SFP or SFP+ from Ubiquiti. Or you can buy from third-party fibre optic transceiver manufacturers. How to choose a reliable supplier from so many fibre transceiver manufacturers? When buying fibre transceiver, the quality, price, and after-sales service should be considered. As one of fibre optic transceiver manufacturers, Fiberstore is suggested to be a good choice for fibre transceiver needs. For more information about FS.COM fibre transceiver, please visit our site www.fs.com/uk or contact us via sales@fs.com.

Related article of my blog: Transceiver Solutions for Ubiquiti UniFi Switches

What’s the Difference Between Cisco GLC-SX-MM and Cisco GLC-SX-MMD?

Cisco 1000BASE SFPs keep a huge market share in the optic area. Cisco SFPs offer users optical solutions for long distance and short distance transmission. For short distance, there are 1000BASE SX SFP, such as Cisco GLC-SX-MM and Cisco GLC-SX-MMD. Though these two modules have great similarity, they are actually different. Then what’s the difference? This article will introduce the details of Cisco GLC-SX-MM and Cisco GLC-SX-MMD SFP transceiver modules.

glc-sx-mm

Cisco GLC-SX-MM

Cisco GLC-SX-MM 1000BASE-SX SFP is a duplex transceiver for short distance transmission, operating at the wavelength of 850 nm at the data rate of 1Gbps. It connects with OM2 multimode LC patch cords supporting up to 550 meters. The hot-swappable 1000BASE-SX SFP is compatible with the IEEE 802.3z 1000BASE-SX standard. And it’s RoHS compliant.

Cisco GLC-SX-MMD

Cisco GLC-SX-MMD 1000BASE-SX SFP is another type of hot-swappable optical transceiver for short reach data transmission. This 1000Base-SX transceiver supports data rates up to 1.25Gbps. Same to Cisco GLC-SX-MM SFP, it also has duplex LC interference. Connecting with OM2 MMF, it can support the distance up to 550 meters. It’s compliant with SFP Multi-Source Agreement (MSA) standards. Cisco GLC-SX-MMD is composed of five parts: the LD driver, the limiting amplifier, the digital diagnostic monitor, the VCSEL laser and the PIN photo-detector. The Digital Diagnostic Monitoring (DDM) function is its special feature.

DDM of GLC-SX-MMD

From the above content, you can see the main difference between these two transceivers is the DDM. When you buy SFP transceivers in the market, you may come across this selection difficulty whether to choose an SFP with DDM or not. So what’s DDM?

DDM is short for digital diagnostic monitoring. It’s also known as diagnostic optical monitoring (DOM). Diagnostic monitoring interface outlined in the SFF-8472 MSA is an extension of the serial ID interface defined in the GBIC specification, as well as in the SFP MSA. Today, many SFP transceivers have the function of digital diagnostics monitoring according to the industry standard MSA SFF-8472. It provides the important information about the status of the transmitted and received signals. This approach allows for better fault isolation and error detection.

DDM mainly plays the role in two sides: monitoring and warning. It monitors detailed information about a transceiver. And it offers a system of alarm and warning flags which alert the host system when particular operating parameters are not in line with the normal operating parameters set by the factory. So users can find out the fault isolation according to outcomes of DDM, and predict failure possibilities and prevent such fault.

Real-time monitoring—With a 2-wire serial bus (also known as “I2C” or “I2C” protocol), digital diagnostics can monitor the SFP module’s temperature, receiver power, transmitter bias current, and transmitter power by a microcontroller inside the transceiver. Usually, the output of the physical value of each parameter is an analog voltage or current from the Trans impedance amplifier, the laser driver, or the post amplifier. Then the digitalised value can be processed as part of a control loop, trigger an alarm, or just record the data into a register.

Calibration and warning thresholds—In addition to generating digital readings of internal analog values, DDM can also produce various status bits. Calibration and warning thresholds value is made during the device manufacturing process. Comparing current values generated by DDM and factory preset limits, users will know whether or not the transceivers have met the desired operation requirements.

FS.COM Cisco Compatible GLC-SX-MM SFPs

FS.COM brings Cisco compatible 1000BASE-SX SFPs including GLC-SX-MM and GLC-SX-MMD SFPs.
The 1000BASE-SX standard optics are developed to support lower cost multi-mode fibre runs in horizontal and shorter-length backbone applications. The following figure shows two Cisco GLC-SX-MM SFP transceivers are connected by an LC MMF patch cable.

glc-sx-mm-connection

Item Part No. Description
a. 11774 Cisco GLC-SX-MM Compatible 1000BASE-SX SFP 850nm 550m Transceiver
b. 43132 2M LC UPC to LC UPC Duplex 2.0mm PVC(OFNR) OM2 Fibre Optic Patch Cable
b. 11774 Cisco GLC-SX-MM Compatible 1000BASE-SX SFP 850nm 550m Transceiver

Note: you can use GLC-SX-MMD SFPs to replace GLC-SX-MM SFPs for shorter-length backbone application, too.

Conclusion

This article introduces Cisco GLC-SX-MM and Cisco GLC-SX-MMD SFP transceivers. Both kinds can realise short distance connection. The difference is that GLC-SX-MMD has DDM function while the other has no. So it’s up to you to decide whether you need DDM function to monitor parameters of the SFP. Fiberstore supplies optical transceivers with DDM and without DDM to satisfy customers’ different needs. If you need more information, please contact us via sales@fs.com or visit our site www.fs.com/uk.

Related Article: A Quick Overview of Cisco 1000BASE-T GLC-T SFP Copper Module

How to Choose Satisfying Cisco SFP Transceiver Modules?

Today, various types of 1000BASE SFP transceiver modules can be found in the market. But should you choose one for long distance and short distance application? Or buy copper optics? Which brand is the most reliable and cost-effective, Cisco, HP, Avago, etc.? Do the third-party optics operate as well? So how to find satisfying SFP transceiver modules which suit your switch most? Now keep reading this article and you will get the method. Take three most common types of Cisco SFP modules as example.

Three Types of Cisco SFP Modules
GLC-SX-MM SFP

This GLC-SX-MM 1000BASE-SX SFP transceiver module is a duplex SFP transceiver for optical communications. It can support the data rate of 1Gbps reaching the distance up to 550 meters over OM2 multimode cable. The GLC-SX-MM transceiver operates at 850nm wavelength. It’s compatible with the IEEE 802.3z 1000BASE-SX standard, which is usually applied in Gigabit Ethernet. There are also GLC-SX-MMD and GLC-SX-MM-RGD SFP modules. “D” of GLC-SX-MMD means Digital Optical Monitoring (DOM) support which supports transceiver monitoring and troubleshooting operations. “RGD” of GLC-SX-MM-RGD refers to rugged (RGD) transceiver module, which features enhanced ESD (electrostatic discharge) protection, and extended operating temperature range.

cisco_glc-sx-mm

GLC-LX-SM SFP

The Cisco GLC-LH-SM 1000BASE-LX/LH transceiver is an LC duplex SFP transceiver applied for Gigabit Ethernet network. This module is designed for both short distance and long distance data transmission. If connecting with single-mode fibre patch cable, it can reach up to 10 km. If connecting with multimode fibre patch cable, it can go up to 550 meters. The GLC-LH-SM transceiver operates at 1310nm wavelength. This transceiver is compliant with Multi-Source Agreement (MSA) standards. LX means long wavelengths and LH is short for long haul. 1000BASE-LX is the Gigabit Ethernet standard specified to work over a distance of 5 km over single-mode fibre cable. 1000BASE-LH and 1000BASE-LH/LX are often used by the manufacturers. Thus, we often see 1000BASE-LX/LH instead of 1000BASE-LX.cisco-glc-lx-sm

GLC-T SFP

The GLC-T 1000BASE-T SFP is a hot-swappable input/output device that plugs into a Gigabit Ethernet port or slot, linking the port with the network. It supports the max data rate of 1000Mbps reaching 100 meters links over copper cables such as Cat5, Cat5e or Cat6a. This transceiver is fully compliant with the MSA and 1000BASE-T standards as specified in IEEE 802.3-2002 and IEEE 802.3ab.

glc-t

Original Cisco or Third-party?

“Third-party” means a supplier (or service provider) who is not directly controlled by either the seller (first party) or the customer/buyer (second party) in a business transaction. For fibre optics industry, all fibre optic transceivers are defined by Multi-Source Agreement (MSA). MSAs strictly define the operating characteristics of fibre optic networking equipment. Therefore, as long as a manufacturer complies to MSA guidelines, their transceiver modules will function and operate identically to other manufacturer’s MSA-compliant transceivers. For example, the above fibre optics like GLC-SX-MM, GLC-LH-SM and GLC-T made by FS.COM are completely compatible with Cisco networking equipment.

Whether to buy original or compatible SFPs may depend on the the cost. Original SFPs are much more expensive than the third-party modules. Using the third-party optics can absolutely help you save the cost. Considering the third-party SFPs from the third vendor, you may worry about the quality and compatibility. As to Cisco compatible GLC-SX-MM, GLC-T, GLC-LH-SM SFP modules, lots of vendors can produce these optics. So it’s necessary to ask information about OEMs and compatibility test from your third-party optics supplier.

Conclusion

From the above introduction, you must have a well understanding about three common Cisco 1000BASE SFPs. When choosing SFP modules, you should consider whether it matches the switch port and the cable you have prepared. If you have multimode cable, then you can choose GLC-SX-MM 1000BASE SFP. If you use single-mode fibre cable, you should select GLC-LH-SM 1000BASE SFP. While if your cable is copper category, you have to use GLC-T 1000BASE-T SFP. On condition that your budget doesn’t allow you to buy original brand module, you can buy the third-party optics from FS.COM with Cisco, Avago, HP and other compatible brands. All the optics have gone through test for 100% compatibility. Any question, please contact us via sales@fs.com.

CWDM SFP Overview

What is CWDM SFP

Coarse wavelength division multiplexing (CWDM) is a kind of wavelength division multiplexing (WDM) technology which combines multiple signals on laser beams along the fibre. Its system utilizes non-stabilized lasers along broadband filters channel spacing of 20 nm, allowing channels up to 18. It is a cost-efficient solution in telecoms or enterprise networks. This technology can integrate with transceiver modules especially small form-factor pluggable (SFP) modules. With CWDM technology, SFP modules can have different wavelengths assigned to them from 1270 nm and 1610 nm, meeting different requirements. Those SFP modules which use CWDM technology are called CWDM SFP modules. CWDM SFP modules are hot-swappable transceiver components that are used to connect fibre cables and switches.

Introduction to Cisco CWDM SFP

Cisco CWDM SFPs are the most popular compact CWDM SFP transceivers used in communications for both telecommunication and data communications. Those transceivers modules can plug into standard receptacles in Cisco routers and switches and convert Gigabit Ethernet electrical signals into a single-mode fibre-optic (SMF) interface. They can even use different wavelengths to transmit and receive signals, making fibre to fibre configuration possible. The following picture shows how CWDM SFP makes a point-to-point link. By using different channels, four channels can be transported over a single fibre strand through CWDM SFP, building a point-to-point connection.CWDM SFP

As above mentioned, CWDM SFP modules have different wavelengths from 1470 nm to 1610 nm. Cisco CWDM SFP modules have eight wavelengths in that region. Different colour markings are used to identify the wavelength to which the Gigabit Ethernet channel is mapped. The following table lists the specific colours for different wavelengths.

CWDM SFP wavelengths and color coding

How to Install CWDM SFP
To install CWDM SFP, you should know the following details.
  • Step1: Remove the CWDM SFP module from its protective packing, and verify the model of CWDM SFP. (CWDM SFP module can be identified by its label which lists the SFP module and the wavelength or by its colour bar on the bale clasp.)
  • Step2: Verify that the bale clasp on the front of the SFP module is closed before inserting the SFP module.
  • Step3: Align the CWDM SFP module in front the slot opening, slide the SFP module into the slot, and verify that whether the connect on the module snaps into place in the rear of the slot.

Note: The dust plugs can protect the CWDM SFP module optical ports and the cable connectors from contamination. You can only remove them from the optical bore of the CWDM or from the fibre optic cable when you are ready to use the module to connect the cable.

For more information about CWDM SFP, you can visit www.fs.com.

Fiberstore Compatible 1000BASE-LX/LH SFP modules

1000BASE-LX/LH was standardized six years after the initial gigabit fibre versions as part of the Ethernet in the First Mile task group. It is very similar to 1000BASE-LX, but achieves longer distances up to 10 km over a pair of single-mode fibre due to higher quality optics. The 1000BASE-LX/LH SFP module, compatible with the IEEE 802.3z 1000BASE-LX standard, operates on standard single-mode fibre-optic link spans of up to 10 km and up to 550 m on any multimode fibres. Duplex LC/PC connector.

1000BASE-LX/LH SFP

Features

  • Compliant with SFP MSA standard
  • Compliant with IEEE 802.3z
  • +3.3V single power supply and TTL Logic Interface
  • 10km with 9/125 µm SMF
  • 1310nm FP laser and PIN photodetector for 10km transmission
  • Hot-pluggable SFP footprint duplex LC connector Interface
  • Class 1 FDA and IEC60825-1 Laser Safety Compliant
  • Duplex LC connector
  • Compliant with SFF-8472
  • ROHS compliant
  • Average Output Power:-9~ -3dBm
  • Receiver Sensitivity:-21dBm

Applications

  • 1000BASE-LX/LH Ethernet
  • Data storage networks

Fiberstore 1000Base-LX/LH SFP module over single-mode fibre, which is a high performance and cost effective transceiver. It is designed to meet Gigabit Ethernet (1000Base) application. The transceiver consists two sections: the transmitter section consists of a high reliability 1310nm FP LD with monitor photo detector (MPD) in eye safety; the receiver section consists of a high-speed InGaAs PIN photodiode (PD) and trans-impedance preamplifier. The output of the PD drives the post-amplification, quantizing, and optical signal detection circuits. The receiver is built in the LOS monitoring function. For further information, please see SFP MSA and SFF-8472 standard.

With plenty experience in interoperability with 3rd party standard based network equipment such as Cisco, HP, Juniper, Netgear, 3 Com, Alcatel-Lucent, D-LINK, Extreme, and HuaWei, Fiberstore’s fibre optic transceiver are able to fulfill enterprises, service providers, telecom operators and SAN providers to build and fulfill their existing and future network expansions.

Compatible Fibre Optic Transceiver List

Brand Model Description
Brocade E1MG-LX-OM 1000BASE-LX SFP SMF 1310nm 10km LC DDM
Cisco GLC-LH-SM 1000BASE-LX/LH SFP SMF 1310nm 10km LC
Cisco GLC-LH-SMD 1000BASE-LX/LH SFP SMF 1310nm 10km LC EXT DDM
Dell 320-2879 1000BASE-LX SFP SMF 1310nm 10km LC DDM
Extreme Extreme 10052 1000BASE-LX SFP SMF 1310nm 10km LC DDM
HP JD119B 1000BASE-LX SFP SMF 1310nm 10km LC DDM
HP J4859C 1000BASE-LX SFP SMF 1310nm 10km LC DDM
Juniper EX-SFP-1GE-LX 1000BASE-LX SFP SMF 1310nm 10km LC DDM
Juniper JX-SFP-1GE-LX 1000BASE-LX SFP SMF 1310nm 10km LC DDM
Netgear AGM732F 1000BASE-LX SFP SMF 1310nm 10km LC DDM

To save more money, We suggest that compatible 3rd transceiver modules may be another good choice however, you should make sure that your vendor is reliable. Fiberstore’s SFP transceivers are 100% compatible with major brands, they are backed by a lifetime warranty so that you can buy with confidence. Additionally, customize SFP transceivers to fit your specific requirements are available. If you have any requirement of transceivers, Fiberstore will be a good choice for you.

Cisco Mini GBIC SFP Transceiver Quick Start Guide

Easily Connect Switches with Fibre Optic Networking Modules Highlights

  • Adds fibre-optic connectivity to Cisco Small Business and Cisco Small Business Pro Series switches
  • High-performance link for connecting networks within a building or small campus area
  • Easy removal with an integrated spring latch
  • Hot swappable to maintain network availability

MFE and MGE are two kinds of Cisco Mini GBIC SFP transceivers, which are easy-to-install modules that provide a simple way to add fibre connectivity or to add an extra Gigabit Ethernet port to your Cisco Small Business or Cisco Small Business Pro Series switches. The transceivers are available for single mode or multimode fibre-optic cabling and can support distances from 100 meters up to 40 kilometers.

The Cisco Mini GBIC SFP transceiver provide fast and reliable connectivity between switches that are located on different floors, in separate buildings, or on a small campus network needing connectivity between sites. These transceivers can support both Fast and Gigabit Ethernet applications.

Description of MFE and MGE SFP Transceiver Modules

MFE Transceivers

  • MFEBX1 Cisco 100BASE-BX-20U SFP transceiver for single-mode fibre, 1310 nm wavelength, support up to 20 km, with Single LC connector
  • MFEFX1 Cisco 100BASE-FX SFP transceiver, for multimode fibre, 1310 nm wavelength, support up to 2 km, with Duplex LC connector
  • MFELX1 Cisco 100BASE-LX SFP transceiver, for single mode fibre, 1310 nm wavelength, support up to 10 km, with Duplex LC connector

MGE Transceivers

  • MGBBX1 Cisco 1000BASE-BX-20U SFP transceiver, for single mode fibre, 1310 nm wavelength, support up to 20 km, with Single Lc connector
  • MGBLH1 Cisco 1000BASE-LH SFP transceiver, for single-mode fibre, 1310 nm wavelength, support up to 40 km, with Duplex LC connector
  • MGBLX1 Cisco 1000BASE-LX SFP transceiver, for single-mode fibre, 1310 nm wavelength, support up to 10 km, with Duplex LC connector
  • MGBSX1 Cisco 1000BASE-SX SFP transceiver, for multimode fibre, 850nm wavelength, support up to 550 m, with Duplex LC connector
  • MGBT1 Cisco 1000BASE-T SFP transceiver for category 5 copper wire, support up to 100 m, with RJ45 connector

Features

  • Built-in spring latch for easy module removal
  • Hot swappable
  • Low insertion-loss duplex LC receptacle
  • Low electromagnetic interference (FCC Part 15, Class B) for clear communications
  • Meets FDA and International Electrotechnical Commission (IEC) eye safety standards

Connecting the Transceiver

Tips: Optical SFPs use a small laser to generate the fibre-optic signal. Because invisible laser radiation may be emitted from the aperture of the port when no fibre cable is connected, avoid exposure to laser radiation and do not stare into open apertures. Keep the optical transmit and receive ports covered whenever a cable is not connected to the port.

Connecting the MFEBX1, MFEFX1, MFELX1, MGBBX1, MGBLH1, MGBLX1 and MGBSX1

Step 1 Insert the Cisco Mini GBIC SFP module with the printed side up and the rubber port cap facing out.

MFELX1 and MGBSX1 Connecting Step 1

Step 2 Remove the Cisco Mini GBIC SFP module’s rubber port cap.

MFELX1 and MGBSX1 Connecting Step 2

Step 3 Connect the fibre cable’s LC connector to the Cisco Mini GBIC SFP module’s port.

MFELX1 and MGBSX1 Connecting Step 3

Step 4 Connect the other end of the cable to an SFP module to verify that the fibre connection is complete. For the Cisco MGBBX1, use the Cisco GLC-BX-D as the downstream SFP. For the Cisco MFEBX1, use the Cisco GLC-FE-100BX-D as the downstream SFP. The Cisco MGBBX1 and the Cisco MFEBBX1 support upstream only.

Removing the Transceiver

Step 1 Press the fibre cable’s connector and pull to remove the fibre cable from the Cisco Mini GBIC SFP module.

MFELX1 and MGBSX1 Remove Step 1

Step 2 Pull the module’s bail latch down.

MFELX1 and MGBSX1 Remove Step 2

Step 3 Remove the Cisco Mini GBIC SFP module.

MFELX1 and MGBSX1 Remove Step 3

Removing the MGBT1

Step 1 Press the RJ-45 connector’s tab and pull to remove the cable from the gigabit SFP module.

Step 2 To remove the gigabit SFP module, begin by pulling the module’s pull tab.

Step 3 Remove the Gigabit SFP Module.

Tips: The Linksys company was founded in 1988. It is currently owned by Belkin, who bought it from Cisco, its owners from March 2003 to March 2013. Its products were branded as Linksys by Cisco when it was part of Cisco.

Some Knowldege About HP ProCurve Mini-GBICs and SFPs

About HP ProCurve

HP ProCurve was the name of the networking division of Hewlett-Packard from 1998 to 2010 and associated with the products that it sold. The name of the division was changed to HP Networking (also called HP ProCurve Networking) in September 2010 after HP bought 3Com Corporation. As the then-ProCurve division began to offer LAN switches, Core, Datacentre, Distribution, Edge, Web managed and Unmanaged Switches. The ProCurve was also used with Network Management, Routing and Security products. HP ProCurve transceivers as the part of its networking accessories that are applied to their corresponding switches or routers. Today, we will introduce some knowledge of the HP GBICs and SFPs.

Products Involved In This Paper

HP ProCurve Gigabit-SX-LC Mini-GBIC (Product No. J4858A/J4858B/J4858C)

A small form-factor pluggable (SFP) Gigabit SX transceiver with LC port that provides a full-duplex Gigabit solution up to 550 m on multimode fibre.

HP gbics-J4858C

FS.COM:

  • NEW HP J4858A X121 Compatible 1000BASE-SX SFP 850nm 550m Transceiver Module
  • NEW HP J4858B X121 Compatible 1000BASE-SX SFP 850nm 550m Transceiver Module
  • NEW HP J4858C X121 Compatible 1000BASE-SX SFP 850nm 550m Transceiver Module

HP ProCurve Gigabit-LX-LC Mini-GBIC (Product No. J4859A/J4859B/J4859C)

An SFP format gigabit transceiver with LC connectors using LX technology.

J4859C

FS.COM:

  • NEW HP J4859A Compatible 1000BASE-LX SFP 1310nm 10km Transceiver Module
  • NEW HP J4859B Compatible 1000BASE-LX SFP 1310nm 10km Transceiver Module
  • NEW HP J4859C Compatible 1000BASE-LX SFP 1310nm 10km Transceiver Module

HP ProCurve Gigabit-LH-LC Mini-GBIC (Product No. J4860A/J4860B/J4860C)

A small form-factor pluggable (SFP) Gigabit LH transceiver that provides a full-duplex Gigabit solution up to 70 km on single-mode fibre.

J4860C

FS.COM:

  • NEW HP J4860A Compatible 1000BASE-ZX SFP 1550nm 80km Transceiver Module
  • NEW HP J4860B Compatible 1000BASE-ZX SFP 1550nm 80km Transceiver Module
  • NEW HP J4860C Compatible 1000BASE-ZX SFP 1550nm 80km Transceiver Module

Knowledge You Should Know About HP GBICs and SFPs

For the above products, there usually are many questions about them. The following infomation will make you to know more about them.

Supported Platform

According to HP ProCurve Networking Mini-GBIC Support Matrix, we can easily find out which HP GBICs and SFPs are supported on which ProCurve Systems. General rules are:

  • Please use only genuine or high-quality 100% compatible ProCurve Mini-GBICs and SFPs on ProCurve System.
  • Newer ProCurve products require revision “B” or later Mini-GBICs and SFPs (product number ends with the letter “B” or later, for example J4858B, J4859C).

Some-Compatible-Systems-1024x378

About the Version A, B, C

HP GBICs and SFPs have three version, but you may not find A and B anymore in HP’s official website. In fact, the version A, B and C are the development of HP ProCurve Mini-GBIC and SFP. Though there is no big difference between these three version, some improvement will be added in the newest version, and the supported platforms adjustment. The “revision C” Mini-GBICs (eg. J4858C, J4859C, J4860C) are supported in all ProCurve products that support Mini-GBICs. In addition, “revision B” and “revision C” mini-GBICs can be used together in any ProCurve switch that supports mini-GBICs. Actually, as the transitional products, HP stops offering the version A and version B. But version C are not supported on some old switches, thus, some users have still used the version A or version B. FS.COM can support the 100% compatible HP ProCurve Mini-GBICs and SFPs at version A, B and C, such as J4858A/B/C, J4859A/B/C, J4860A/B/C.

Mini-GBICs and SFPs hot-swappable

All ProCurve Mini-GBICs and SFPs are hot-swappable (they can be installed and removed while the switch is powered on). However, the network cable should be disconnected before removing the HP GBICs or SFPs from the switch.

Best practice tip: After inserting a transceiver into a ProCurve switch, the Mode LED will come on for two seconds while the transceiver is initialized. Do not remove the transceiver until the Mode LED has turned off. For the Switch 2600 and 2800 Series: After inserting a transceiver into a 2600 or 2800 switch, the “M” LED will come on to indicate that the mini-GBIC slot is active. Wait at least two seconds after the “M” LED comes on if you need to remove the transceiver.

Conclusion

FS.COM is a professional manufacturer and supplier of optical networking solutions. We can supply 100% compatible fibre optic transceiver of many brands, like HP, Cisco, Dell, D-link etc. with a incredible discount. About HP, you can find a full product line of our New HP transceivers with a good price and enjoy same-day shipping. In addition, according to your requirements, we welcome any inquiry for customized fibre optical transceiver. FS.COM’s aim is offering the best quality products and perfect solutions, saving customers’s time and money, making customers enjoy personalisation.

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