Tag Archives: optical transceiver

How to Install SFP transceiver Correctly?

SFP (small form factor pluggable) transceiver is now ubiquitous in Gigabit Ethernet networks. It serves as a hot-pluggable I/O devices that being inserted into module sockets to create 1 Gigabit transmission. SFP transceiver is generally used for applications both in telecommunication and data communication, which can be intermixed with 1000BASE-T, 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX and 1000BASE-BX10-D/U on a port-by-port basis. Fail to install SFP transceiver can cause catastrophic damage to the module and network, hence it is better to grasp some knowledge on the right installation procedures.


Precautions for Installing SFP Transceiver

Here are some precautions you should be aware of before delivering installation.

  • Make sure to disconnect all the cables before installing the SFP transceiver, in case any damage that may be caused to cables, connectors and the optical interfaces.
  • Try not to install and remove the SFP transceiver too often since this may shorten its life expectancy.
  • Transceiver modules are rather sensitive to static, it is suggested to use an ESD wrist strap or comparable grounding device during the process of installation and removal.
  • Never remove the dust plug from the SFP transceiver unless you are ready to put it into use. Similarly, the dust plug on the SFP transceiver is used to protect the optical bore and shall not be removed until you attaching patch cable to it.

Additionally, some professional tools are also required to complete the installation, including:

  • Wrist strap or other personal grounding device to prevent ESD occurrence.
  • Antistatic mat or antistatic foam to set the transceiver on.
  • Fiber-optic end-face cleaning tools and inspection equipment.
SFP Transceiver Installation: How to Make it Right?

SFP transceiver primarily have three types of latching devices to secure itself in a port socket: a mylar tab latch, a bale-clasp latch and an actuator button latch. With the bale-clasp latch to be the most widely used one. You should be clear which type of latch your SFP transceiver have before install it. Bear the aforementioned precaution in mind, then perform the following steps to complete installing SFP transceiver.


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. Remove the SFP transceiver module from its protective packaging.

Note: Do not remove the optical bore dust plugs until directed to do so later in the procesure.

Step 3. Check the label on the SFP body to verify that you have the correct model for your network.

Step 4. Find the send (TX) and receive (RX) markings that identify the top side of the SFP transceiver.

Note: On some SFP transceivers, the TX and RX marking might be replaced by arrowheads that point from the SFP transceiver connector (transmit direction or TX) and toward the connector (receive direction or RX).

Step 5. Position the SFP transceiver in front of the socket opening.

Note: different devices may have various SFP module socket configurations, either a latch-up or a latch-down orientation. Ensure that you are installing the SFP transceiver in the correct orientation for your device. Refer to the hardware installation instructions that came with your device for mire details.

    • For transceiver with a mylar/pull tab.


    • For transceivers with a bale-clasp latch.


  • For transceivers with an actuator latch.


Step 6. Insert the SFP transceiver into the socket until you feel the SFP module connector snap into place in the socket.


Note: For optical SFP transceivers, before you remove the dust plugs and make any optical connections, observe these guidelines:

  • Always keep the protective dust plug on the unplugged fiber-optic cable connectors and the transceiver optical bores until you are ready to make a connection.
  • Always inspect and clean the LC connector end-faces just before you make any connections.
  • Always grasp the LC connector housing to plug or unplug a fiber-optic cable.


Step 7. Press the SFP into the slot firmly with your thumb. You must press firmly on both the transceiver face-plate and the actuator button to ensure that the transceiver is properly latched in the socket.


Step 8. To verify that the SFP is seated and latched properly. Grasp the SFP and try to remove it without releasing the latch. If the SFP can not be removed, it is installed and seated properly. If the it can be removed, reinsert it and press harder with your thumb, repeating if necessary until it is latched securely into the socket.


Step 9. Remove the dust plugs from the LC fiber patch cable and save the dust plugs for future use. Then inspect and clean the patch cable end-face.

Step 10. Remove the dust plugs from the SFP transceiver optical bores. And immediately attach the LC fiber patch cable to the SFP transceiver.


To install a SFP transceiver is a commonplace in data center, yet not as easy as it appears. There are much to consider before you actually perform the action. And you have to get fully prepared with a thorough plan. Hope this step-by-step guide would be informative enough to practice right SFP transceiver installation. FS provides a whole line of optical transceiver products, including SFP, SFP+, QSFP+ and QSFP28 transceiver modules, as well as CWDM and DWDM transceivers. For more details, please visit www.fs.com.

Related Article: Optical Module Maintenance Methods and Installation Tips

Related Article: FS 40G QSFP+ Modules And DAC/AOC Cables Installation Guide

How to Choose the Right Type of Optical Transceiver

Choosing the right type of fiber optic transceiver is not easy. You can approach the selection process by reviewing the device as a single entity or you can explore the fiber cable separately. Either way, you need to be aware of what’s needed for your application to work optimally. If you know what you need to edge out the competition, you’ll be in a better position when you’re speaking with representatives about the fiber optic cable. Here’s what you should consider:

Which Fiber Mode That’s Required
There are two basic types of fiber: multimode fiber and single-mode fiber. Multimode fiber will allow each signal to travel on more than one pathway at one time, which is best designed for short transmission distances, and is suited for use in LAN systems and video surveillance. Single-mode fiber is best designed for longer transmission distances, which is used in applications that need bandwidth that will travel over long distances.

Determine if You’ll Need Full-Duplex or Half-Duplex
Some chips will only use full-duplex configuration. Selecting switches, HUBs, or transceivers with half-duplex mode may cause loss and conflict. Only choose full-duplex unless you think that your application can support half-duplex. Nowadays, Ethernet interfaces on the switch operate at 10, 100, or 1000 Mbps, or 10,000 Mbps and in either full- or half-duplex mode.

Consider Whether You’ll Need a Safety Device to Prevent Packet Loss
Some vendors may just need to reduce costs and loss. Thus, they have to choose a transceiver with maximum safety features and loss prevention.

Consider Whether the Transceivers Have Temperature Adaptability
Optical transceivers shouldn’t run hot. Optical transceivers may fail prematurely at high temperatures. That is why it’s important to know how well an optical transceivers can adapt to heat if it will be in high temperatures.

Determine if You’ll Need Copper or Optical Fiber
Take an example of Gigabit Ethernet SFP module, 1000BASE-T (e.g. GLC-T) SFP module operates on standard Category 5 wiring and has a RJ-45 connector. 1000BASE-SX SFP transceiver operates on ordinary multi-mode fiber optic link spans of up to 550 m in length. 1000BASE-LX/LH SFP operates on single-mode fiber (SMF) for a maximum length of 10km. 1000BASE-ZX SFP using an extended wavelength operates on single-mode optical fiber for up to 100km.

Consider the Construction of the Fiber You’ll Need
There are some basic types of internal construction, but you have to choose the one that will work best for your application. One of the most popular types is the distribution or tight pack. The second type of construction is the breakout or fanout design. This design gives each buffered fiber its own individual jacket and is a more durable design.

Optical TransceiversThe zip cord or assembly is another type of internal construction that is offered to the designers. This is one of the preferred internal construction options. In this construction, one or two buffered fibers in individual jackets should be considered. Single fiber cable is recommended for patching.

The last factor you should consider is the level of flame resistance. Remember that there are three different grades available: general, special, and high. The level of flame resistance can be measured through a variety of tests including those determining smoke density values and flame propagation.

Choosing the Right Type of Optical Transceiver is Not Easy
Choosing the right type of fiber is not easy. There are lots of elements to be considered. These are typically considered on a case-by-case basis. Consider all of the factors mentioned such as the internal construction, fiber mode, fiber cable jackets, and the level of flame resistance.

OEM Optical Transceiver Solution
Fiberstore is a professional OEM manufacturer and supplier of optical networking solutions, which can supply 100% compatible Cisco SFP and SFP+ transceivers, such as GLC-SX-MM, GLC-SX-MMD, GLC-T, GLC-LH-SMD and GLC-FE-100LX, etc. According to your requirements, Fiberstore welcome any inquiry for customized fiber optical transceiver.

Related Article: How to Select the Right Fiber Patch Cable for 40G QSFP+ Transceiver?

Related Article: SFP Module: What’s It and How to Choose It?

Related Article: What Is An Optical Module?

How to Identify The Refurbished Optical Transceiver Module

Nowadays, there is a variety optical transceivers on the market and some of them may be the refurbished optical transceivers. Driven by the huge economic profit, some unscrupulous manufacturers mislead customers to use the refurbished or inferior optical transceiver modules on their switches, servers, base station equipment or storage devices. What’s worse, they have even faked the famous brand optical transceiver modules. These shoddy refurbished optical transceivers illegally entered the markets may result in heavy losses to us. This article is explaining how to identify the refurbished transceiver modules, and buy a high-quality transceiver module.

Sources & Disadvantages of the Refurbished Optical Transceiver Module


In general, the sources of refurbished transceiver module include the following two ways.

  • Some transceiver modules have been used for certain years, and they will be eliminated due to the update of equipment or damaged due to improper use. The unscrupulous manufacturers recycle these old or damaged transceiver and refurbish them, these refurbished transceiver modules generally have serious impact on the service life.
  • Some unqualified transceiver modules can not pass the on line tests and ready to destroy. These unqualified transceivers are used by the unscrupulous manufactures to fake the high-quality transceivers. However, the parameters of these transceivers are not standard. It will have a great impact on the stability of data transmission, and even have serious damages on the equipment.


The generally speaking refurbished transceiver modules are referred to the secondhand or unqualified transceiver modules mentioned above. They are bought by some unscrupulous businessmen of low prices and renewed with a number of technical renovation (for example: replacing the shell, replacing the clasp, or replacing the labels, etc). These refurbished transceivers have a lower price than the original one and can easily attract the users. However, many issues have been occurred when using:

  • Pollution on the light path
  • Easy to damage
  • Short using life
  • Low receiving sensitivity
  • Cannot meet the high or low temperature working environment

How to Identify The Refurbished Optical Transceiver Module

Here are three methods to identify the refurbished optical transceiver module:

  • Appearance recognition. Check the appearance of the transceiver modules: new module’s appearance generally has good consistency while the refurbished module is not glossy, and have some wear and scratches in the rim angle. Many refurbished transceivers are replaced with a new shell, in this case, we can see the interface of the modules, if there is dust and not smooth, it is the refurbished modules.
  • Check the ferrule. Pulled out of the dust cap, we can see the ferrule in the bore. In general, the multimode transceiver has plastic ferrules or metal ferrules while the singlemode transceiver has the metal ferrule. A second-hand old module is lack of glossy, and generally rough and with scratch that has a bad consistency. The ferrules of a new quality module is brightness of color and lustre and has a good consistency.
  • Put the modules working under the status of 50-60 °C and see if it is working properly. In generally, a refurbished optical transceiver module can not work well or even disconnect.

Avoiding Refurbished Transceiver Module, A Quality Vendor Is Necessary

No matter there are how many tips or methods on how to identify, the best way to avoid buying refurbished transceiver module is to choose a quality vendor. The reason why many users have bought the refurbished transceivers is the attractive low price of them. As we know, the costs for transceiver modules modules keep adding up over time. In order to save more, a low cost option of the transceiver is the expectation of the users. How and where to find a quality vendor? Fiberstore is your best choice. Fiberstore provides a full set of compatible fiber optic transceiver module solution cover all the famous brands, such as Cisco, HP, Finisar and so on, which can satisfy you with a full range of services. In addition, we can also offer the custom service for your special requirements.

Cisco SFP

All our fiber transceivers are 100% compatible with major brands

Cisco, Juniper, HP, Finisar, Brocade, Extreme, Source Photonics, Netgear, Force10, Dell, Foundry, Huwei, Intel, Custom SFP…

A full range of optical transceivers

SFP Transceivers (eg. 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX, 1000BASE-T), SFP+ transceivers (eg. 10GBASE-LR, 10GBASE-SR), QSFP+ & CFP Transceivers, XFP transceivers, 10G X2 & XENPAK and GBIC. Get more information can visit fs.com.

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