It is a small package device that transmits and receives data using fiber optic technology. The word “Transceiver” is the combination of the word ‘transmitter and receiver’. Having both a transmitter and receiver which shares common circuitry is an important part of optical network equipment. It is efficient for it has electronic components to condition, and encode data into a light pulse to the other end of an electric signal. To send data, it uses light source such as DFB laser, VSCEL, and FP, which is controlled by their electronic parts. To receive a light pulse, such as APD and Pin, it uses a photodiode semiconductor.

What is Fiber Optic Transceiver used for?

It is a conversion device that converts an electrical signal into optical signals. After the transmission side on the fiber optics, the signals are transferred into an electrical signal at the receiving. The network cables are usually used in the traditional network, but their communication bandwidth and signal quality can no longer meet the growing needs of clients. However, the legacy of optic networks makes the optical change, fiber converters, SDH, fiber optic multiplexers, and more attached equipment of fiber optic. In the work process, the optic transceiver modules are needed to convert electrical signals via the laser driver.

Gigabit Switch and Fiber Transceiver Production

Gigabit switches is responsible for the connection of multiple devices in a data transferring network while Fiber optic transceivers are for communication network design to transmit and receive data.

Transmission Failures Trouble Shooting and Solutions

For example, we have a 10g SFP+ optical module when the switch optical port is connected with any other device which is not active. You can start to trouble the port and the plugged-in FOT from the following aspect:

First, check whether the working modes of the both attached ports match with each other, or if the working modes of the interface where the SFP plus module is located match the state of the optical transceiver. You can execute the commands written in the show interface brief, to check it. If they are not compatible, you can now use the speed and duplex mode to configure out and fix it.

Second, check if the ports of both devices which need to be inserted are normal through the loopback test. Try to connect the two 10G SFP ports through a 10G SFP+DAC cable. If the 10G SFP plus ports are on, for sure there is an opposite network device or vice versa.

Then, Examine the standard parameters of the fiber optic transceivers. It includes checking the DDM, Optical Power, Wavelength, and Transmission Distance.

Unstable Link Connection

When it happens that the whole link is not stable constantly, including the port status light indicator in on or off. Stat to check the modules. You can also include checking the DDM of the module to see the optical power. Change the transceiver and fiber patch cables if the transmitting power is close to the threshold value. Set the duplex mode for the optical transceiver.

Module Not Supported by Network Device

When checking the system log, if you found that there is reported illegal optical module information try to check the encoding information. If you found out that the encoding is incorrect, start to re-encode the transceiver. If it still keeps on erroring, contact the supplier for a technical problem.

Transmission Distance

The distance over which optical signals can transmit. Different types of sources can transmit over distances by optical signals, such as dispersion and attenuation. Select optical modules and fibers, when connecting the optical interface, based on the maximum signal transmission distance.

Central Wave Length

It represents the waveband used for optical signal transmission. At first, there are three central wavelengths for common fiber transceiver modules: 1550 nm, 1310 nm, 850 nm, representing three wavebands respectively.

Optical Transmit Power

The output of an optical transceiver when it is working properly. When two OPT’s are connected, transmit optical power of one end must be within the target range of the receive OTP on the other end.

Fiber Mode

The mode of OPT is defined based on core diameters and features of optical fibers. It is classified into single-mode and multi-mode. The multi-mode has a big core diameter while the single-mode has a small call core size. The multi-mode can transport multiple modes while the single-mode can only have small dispersion.

Connector Type

The most commonly used connector types are LC, SC, ST, FC, and MPO connectors. LC is applying to QSFP, SFP, SFP+, SFF, and XFP transceivers.  SC connectors are for BIDI SFP, GBIC, X2, XENPAX, 1×9 transceiver.  ST and FC are applied to 1×9 transceiver, MPO is for QSFP, SR4, and CXP.

Extinction Ratio

The average optical power with signals with the minimum ratio with signals transmitted against the average optical power in complete modulation mode. It will show the capability of an optical module to identify different signals.

Fiber Optic Transceiver Application

It is found in wired networking applications such as InfiniBand, Fiber Cable, Ethernet, SONET/ONT/SDH/CPRI/, and FITX. The platform includes switches, routers, firewalls, network interface cards, and fiber converters.

What is the Optical Switch and How does it work?

It is a technology that operates on fiber optics. It works similarly to traditional electrical network switches. The optical switch mention here is operated by mechanical means, which is physically moved by bulk optic elements.

The Fiber Transceiver and Fiber Switch different with each other

Fiber optic transceivers are simple network hardware devices with less interface than switches. Their winning connection is simple. They can be installed on a rack or used alone. The installation of steps is very simple since the fiber transceiver is a plug-and-play device.


Reducing the probability of troubleshooting the fiber optic transceiver. The best thing to do is choose an optical module with high quality, high reliability, and high availability. Another thing is that it is necessary to learn the right operation method to run network devices correctly. If you want to purchase fiber optic transceivers, welcome to visit QSPFTEK to choose.