How to Choose Optical Media Converter

Optical Media Converters are typically used in real-world network environments where Ethernet cables cannot be covered and optical fibers must be used to extend transmission distances. They also play a huge role in helping connect the last kilometer of optical fiber lines to the metropolitan area network and beyond. Optical Media Converters also provide an inexpensive solution for users who lack the money, manpower or time to upgrade their systems from copper wire to fiber. The function of the Optical Media Converter is to convert the electrical signal we want to send into an optical signal and send it out. At the same time, it can convert the received optical signal into an electrical signal and input it to our receiving end.

Choosing according to the transmission distance:

Single-mode Optical Media Converter: transmission distance of 20 kilometers to 120 kilometers

Multimode Optical Media Converter: transmission distance of 2 kilometers to 5 kilometers

For example, the transmit power of a 5km fiber optic converter is generally between -20 and -14db, and the receiving sensitivity is -30db, using a wavelength of 1310nm; while the transmit power of a 120km fiber optic converter is mostly between -5 and 0dB, the receiving sensitivity is -38dB, using a wavelength of 1550nm.

Choosing according to the fiber resources:

Single-fiber Optical Media Converter: the data received and sent are transmitted on one fiber

Dual-fiber Optical Media Converter: the data received and sent are transmitted on a pair of optical fibers

As the name suggests, single-fiber equipment can save half of the fiber, that is, to receive and send data on one fiber, which is very suitable for places where fiber resources are tight. This type of product uses wavelength division multiplexing technology, and most of the wavelengths used are 1310nm and 1550nm. However, because there is no unified international standard for single-fiber converter products, there may be incompatibility between products of different manufacturers when they are interconnected. In addition, due to the use of wavelength division multiplexing, single fiber converter products generally have the characteristics of large signal attenuation.

Choosing according to the working level/rate:

100M Ethernet Optical Media Converter: working at the physical layer

10/100M adaptive Ethernet Optical Media Converter: working at the data link layer

According to the working level/rate, it can be divided into single 10M, 100M Optical Media Converters, 10/100M adaptive Optical Media Converters and 1000M Optical Media Converters, and 10/100/1000 adaptive converters. Among them, single 10M and 100M converter products work at the physical layer, and the converter products working at this layer forward data bit by bit. This forwarding method has the advantages of fast forwarding speed, high transparency rate, and low delay. It is suitable for use on fixed-rate links. At the same time, since such devices do not have an auto-negotiation process before normal communication, they are compatible better performance and stability.

Choosing according to the working environment:

Desktop (stand-alone) fiber optic converter: stand-alone client equipment

Rack-mounted (modular) Optical Media Converter: installed in a sixteen-slot chassis, using centralized power supply.

According to the structure, it can be divided into desktop (stand-alone) fiber optic converters and rack-mounted fiber optic converters. The desktop Optical Media Converter is suitable for a single user, such as meeting the uplink of a single switch in the corridor. Rack-mounted (modular) fiber optic converters are suitable for the aggregation of multiple users.

Choosing according to the working style:

The full-duplex mode means that when the sending and receiving of data are split and transmitted by two different transmission lines, both parties in the communication can send and receive at the same time. This transmission mode is full-duplex. In the full-duplex mode, each end of the communication system is equipped with a transmitter and a receiver, so data can be controlled to be transmitted in both directions at the same time. The full-duplex mode does not need to switch the direction, so there is no time delay caused by the switching operation.

The half-duplex mode refers to the use of the same transmission line for both receiving and sending. Although data can be transmitted in two directions, the two parties in the communication cannot send and receive data at the same time. This transmission mode is half-duplex. When the half-duplex mode is adopted, the transmitter and receiver at each end of the communication system are transferred to the communication line through the receiving/sending switch to switch the direction. Therefore, time delay will occur.

Post time: 2021-01-20


Lomoveishiy – Finland

I needed those to connect my PC on the third floor to have internet access in that room, and ISP installed their modem on the first floor only. After dropping fiber patch cables, plugged in all cables into these media converters at both sides, and link came up instantly. Was much easier than I thought!

Raymond – USA

Great experience – units worked straight out of the box – just needed plug in cables and we were done. I also like the possibility to enable jumbo frames, while we do not have a need for this feature at the current moment it’s great to have this option.

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