What’s the difference between DFIU and FIU for OSN 1800 Series

What is the difference between DFIU and FIU for OSN 1800 Series-1

Both DFIU and FIU boards are used in Huawei OSN 1800 equipment for handling fiber interfaces.

DFIU stands for “Digital Frequency Interface Unit”, it primarily deals with digital signal processing, enabling the transmission of digital signals across the network, provides fiber interfaces for both East and West directions in a single board. This means it can handle both incoming and outgoing optical signals.

DFIU typically has two subcards, each dedicated to one direction (East and West), ideal for point-to-point connections or situations where bi-directional communication is required, can process optical signals in two directions at the same time, the DFIU is equivalent to two FIUs.


PN: 03030URH

In stock

3-5 days lead time | |

And FIU stands for “Frequency Interface Unit”, it primarily deals with frequency-based signal transmission, provides fiber interfaces for either East or West direction, depending on the specific model. Single FIU boards only handle one direction of optical signals.

FIU can have either one or two subcards, depending on the model. Single subcard models handle only one direction, while dual subcard models (like some DFIU variants) can handle both directions, Suitable for situations where only one-way communication is needed, or where space constraints require a smaller board.


PN: 03030VVP

In stock

3-5 days lead time | |

They all function the same. However, the processing capability of the DFIU is doubled, and the integration is high. However, the cost is high. You need to compare the values based on the actual application scenario. If a network topology is a chain topology, such as A—B—C, only FIU boards need to be installed at sites A and C. Site B requires one DFIU.

Determining which one is better depends on the specific requirements of the network and the nature of the signals being transmitted. If the focus is on digital signal transmission, the DFIU might be more suitable. However, if frequency-based signals are crucial, the FIU might be a better choice. The “better” option often depends on the specific needs and configurations of the network.

In addition, different hardware versions may support different wavelength ranges.

I hope this clarifies the distinction between DFIU and FIU boards for Huawei OSN 1800 equipment. If you have any further questions or need more specific information about particular models, feel free to ask!