J'utilise ces modules BiDi avec des jarretières optiques OM4 pour réaliser une liaison 40G, tout marche très bien, j'en suis content.

This bidi module helps our system run more efficiently. It is super easy to install and use. I used them together with OM4 fiber cable bought here. The whole link works fine. Their customer service is absolutely outstanding and goes out of their way to be helpful to you.

Bought these 40G modules for our data center. They always have a lot of choices for us. This really suits our tastes. These bidi modules work seamlessly on our switches and offer excellent connectivity. We had a comfortable experience. Their website is also simple and informative. We like it.

We made a controlling room and decided to deploy 40G instead of the 10G. But we wanted to reuse our existing LC cabling system, coz changing them to MTP fiber would be a huge and time-costing task for us. When I contacted FS guys, they responded promptly and asked our devices models, fiber types, etc. Then they recommended the BiDi modules. They told us, the modules could work with our MMF fibers. And they also checked the compatibility between the modules and our Cisco devices. We took their advice, and made the order. Our devices accepted the new modules without any issues.

I bought a pair of the 40G transceivers, and they seemed to be well made when I took them out of protective box. Now, they have been used to connect our two Cisco switches with fibers, and no errors appear during the transmission.

Arrived in secure packaging. I'm using this module on a fairly wide variety of hardware, no compatibility problems so far. They seem to have consistent performance.

Recommended by a friend. He told me that the products performed well and the price was relatively favorable. So, I decided to take a chance here. Unexpectedly, their service and products are awesome.
We needed 40G optical modules (better not MPO/MTP interface) for our Cisco switch. The transmission distance was about 100 meters. After receiving our requirements, fs technician recommended this transceiver to us. It could be compatible with our device and it was designed with LC duplex interface. We ordered a pair of this type (Cisco compatible) and received them quickly. We checked them carefully, no scratches or traces of use. And they work perfectly with our switch. Now, we are considering buying some 100G modules...

My overall feeling about this product is pretty good. I have used these models (I got a pair) for nearly half a month, and things were fine, no problem occurred. I think it's worthwhile to buy the 40G transceivers online if the good service before & after purchase could be ensured.
Pre-purchase consultation
I wasn’t quite sure whether the modules I wanted to buy could be used on my Cisco switch. Therefore, I asked the fs technicians and they told me it could. They were very patient and professional. No matter how simple the question I asked, they replied with details.
Logistics
To be honest, when I placed the order, I was worried that the logistics would not be strong because of my urgent need. It turned out I thought too much about it. The logistics were very fast, received in about three days.
Package
The packaging was good with no damage, which should be praised. And there was no difference with the picture shown on the website.
Using experience
Last but most important, they worked well with my switch. The signal transmission was stable and there was no signal loss or module failure. Everything’s fine just like the original Cisco modules I used before. Maybe I will get another two for network expansion.

The transceivers were delivered to me very quickly after my purchase. I used it on my Cisco switch. One and a half month has passed, they still worked very smoothly, without any malfunction. What impressed me most was that my sales rep always gave me an immediate reply when I had questions about the products. Also, she contacted me regularly to care about my conditions of using.

Give them 5 stars for fast delivery and great performance. I needed to set up a 40G network. After asking for opinions, I was told that optical transceivers and cable from fs.com worked well. So at first I bought two to do tests based on the recommendation and their performances are excellent. Then I bought these customized modules and LC cables from fs.com. Several days later, I received my packets. All of them were well packed with nothing broken. I install four modules for Fortinet FortiSwitch 1048E. Setting up on my Fortigate switches was super easy. Now they work perfectly with switches, enough for the link lengths of 100m. All of them work without a hitch. In one word, they are really good stuff saving a great amount of money without performance sacrifice. I’ll buy more of these when I need transceivers next time.