Tag Archives: SFP Transceiver

How to Install SFP transceiver?

SFPSFP stands for Small form-factor pluggable, which is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. It can also be intermixed in combinations of 1000BASE-T1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX and 1000BASE-BX10-D/U on a port-by-port basis. Due to its flexbility, it is welcomed by both network component vendors and users and widely applied in Gigabit Ethernet. For that reason, installing SFP transceiver correctly seems very important. This post is going to give a guide to installing SFP transceiver.

Installing a transceiver module without taking correct measures might result in ESD breakdown of the electronic components in the transceiver module or the transceiver module socket. Obviously, if the ESD breakdown, you might not make your network operate smoothly. Thus, it is very crucial to install SFP transceiver correctly. If you don’t have any reference to install SFP transceiver, then the next guide may help deal with that.

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. Remember do not remove the optical bore dust plugs until directed to do so later in the procedure.

Step 3 Check the label on the SFP transceiver module 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 module.

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

Step 6 Hold it as shown in figure 1, insert the SFP into the socket until you feel the connector latch into place.

figure 1

Figure 1

Step 7 Press the SFP into the slot firmly with your thumb as shown in figure 2. 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.

figure 2

Figure 2

Step 8 To verify that the SFP is seated and latched properly. Grasp the SFP as shown in Figure 3 and try to remove it without releasing the latch.  If the SFP can not be removed, it is installed and seated properly. If the SFP can be removed, reinsert it and press harder with your thumb, repeating if necessary until it is latched securely into the socket.

figure 3

Figure 3

Installing SFP transceiver correctly is not easy as it looks like. You should keep above guides in mind to avoid any wrong operation which leads paralysis of the entire network system. If you want to know more information about SFP transceiver, you can visit Fiberstore. Except for SFP transceiver, there are many other types of transceiver that Fiberstore can provide, such as SFP+ transceiver, GBIC transceiver, CWDM/DWDM transceiver and so on.

Facts You Should Know About XFP Transceiver

Due to its function of transmitting and receiving signals, transceiver plays an essential role in modern fiber optic networks. There are some common types of transceiver include SFP, SFP+, XFP. XFP transceiver is one of the most useful technological advancements on the market. This text is going to illustrate some facts about XFP.

High-speed computer network and telecommunication links using optical fiber will apply XFP standard for transceivers. XFP is a 10-Gigabit small form factor pluggable and was defined as the industry standard in 2002, along with other electrical components. The interfaces are often referred to as XFI. XFI electrical interface specification was a 10 gigabit per second chip-to-chip electrical interface specification defined as part of the XFP multi-source agreement.

Hot-Swappable and Protocol-Independent

XFP transceivers are hot-swappable and protocol-independent, which means that you don’t have to shut down the entire device before replacing it. This adorable feature is welcomed by many of the designers who employ XFP transceivers in their designs. Designers who always need to upgrade their devices or have high failure rates in a harsh environment will appreciate the ability to replace devices quickly.

Operation and Application

XFPs generally operate at wavelengths (colors) of 850 nm, 1310 nm or 1550 nm. Principal applications include 10 Gigabit Ethernet, 10 Gbit/s Fibre Channel, synchronous optical networking (SONET) at OC-192 rates, synchronous optical networking STM-64, 10 Gbit/s Optical Transport Network (OTN) OTU-2, and parallel optics links. They can operate over a single wavelength or use dense wavelength-division multiplexing techniques. They include digital diagnostics that provide management that were added to the SFF-8472 standard.


The XFP specification was developed by the XFP Multi Source Agreement Group. It is an informal agreement of an industry group, not officially endorsed by any standards body. The first preliminary specification was published on March 27, 2002. The first public release was on July 19, 2002. It was adopted on March 3, 2003, and updated with minor updates through August 31, 2005. The chair of the XFP group was Robert Snively of Brocade Communications Systems, and technical editor was Ali Ghiasi of Broadcom. The organization’s website was maintained until 2009.


XFP are available with numerous types, allowing users to select suitable one to meet their needs.

  • SR – 850 nm, for a maximum of 300 m
  • LR – 1310 nm, for distances up to 10 km
  • ER – 1550 nm, for distances up to 40 km
  • ZR – 1550 nm, for distances up to 80 km

Take 10G XFP for example, there are two types: single mode and multi mode. The following picture is a 10GBASE-SR XFP 850nm 300m Multi-Mode Optical Transceiver.



The XFP packaging is smaller than the XENPAK form-factor, which is desirable by many designers. The smaller the footprint, the easier it is to design it into the designs as needed. The best devices support both the XENPAK and the XFP.


From this text, you can acknowledge above facts about XFP transceiver. The hot-swappable
nature of XFPs and the numerous types contribute to easy configuration and future upgrading. Fiberstore provides a complete range of XFP transceiver modules which can be customized. In addition, it also supplies Compatible XFP transceivers as alternatives to those branded by Cisco, HP, Juniper Networks etc. For more information, please visit Fiberstore.

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?

1000BASE-X Media Components

The following set of media components are used to build a 1000BASE-X fiber optic segment:

1. Fiber optic cable

2. Fiber optic connectors

Gigabit Ethernet fiber optic segments use pulses of laser light instead of electrical currents to send Ethernet signals. This approach has several advantages. For one thing, a fiber optic link segment can carry Gigabit Ethernet signals for considerably longer distances than twisted-pair media can. The standard specifies that a full-duplex 1000BASE-LX segment must be able to reach as far as 5,000 meters (16,404 feet, or a little over 3 miles). However, most vendors sell “long haul” versions of 1000BASE-LX equipment that are designed to reach as far as 10 km (6.2 miles) on single-mode fiber. Vendors have also developed “extended reach” versions of 1000BASE-LX single-mode interfaces that can send signals over distances of 70-100 kilometers or more.

In large, multibuilding campuses, the fiber distances can add up fast, as the fiber cables may not be able to take the most direct route between buildings on the campus and a central switching location. Therefore, these long-reach transceivers can be quite useful. The LX interfaces are essential when it comes to building metropolitan area network(MAN) links, in which Gigabit Ethernet is used to provide network services between sites on a city-wide basis.

Fiber optic cable

Both 1000BASE-SX and 1000BASE-LX fiber optic media segments require two strands of cable: one for transmitting and one for receiving data. The required signal crossover, in which the transmitting and one for reciving data. The required signal crossover, in which the transmit signal (TX) at one end is connected to the receive signal (RX) at the ther end, is performed in the fiber optic link. (Related products in: 10GBASE-LR XFP)

Maximum segment lengths for 1000BASE-SX and 1000BASE-LX are dependent on a number of factors. Fiber optic segment lengths in the Gigabit Ethernet system will vary depending on the cable type and wavelength used.

Fiber optic connectors

The original standard recommended the use of duplex SC fiber optic connectors for both 1000BASE-SX and 1000BASE-LX fiber optic media segments. Figure 1 shows a duplex SC connector. Although the standard can recommend a connector, vendors can use other fiber optic connectors as long as they are not forbidden in the standard. For examle, when the 1000BASE-X media systems first became available, vendors used the compact MT-RJ connector on 1000BASE-SX ports.

21   Figure 1, Duplex SC connector
Figure 2 shows the MT-RJ connector, which provided both fiber connections in a space the size of an RJ45 connector. Because the MT-RJ connector takes up about half the space required by the SC connectors, this allowed vendors to provide more 1000BASE-SX ports on swithch.

22 Figure 2, MT-RJ connector


1000BASE-X transceivers

Some vendors used the Gigabit Interface Converter (GBIC), which was an earlier form of transceiver module that allowed the customer to support either the 1000BASE-SX or 1000BASE-LX media types on a single port. The GBIC is a small, hot-swappable module that provides the media system signaling components for a Gigabit Ethernet port.

More recently, vendors have developed a small form-factor pluggable (SFP) transceiver, which can be purchased to support several different kinds of Ethernet fiber optic media systems.

The SFP Transceiver is a small module the plugs into a seitch port and uses a small fiber optic connector called the LC connector. Figure 3 shows the smaller LC fiber optic plug, which is used for connections to SFP fiber optic transceivers.


23Figure 3, Duplex LC fiber optic plug