I got several 25G SFP28 modules from FS, and I didn’t see any difference between them and Cisco’s own transceiver modules except that the thrid-party transceivers are more reasonably priced. Delivery is fast. They are extremely usable right out of the box and work great on Cisco C9500-24Y4C switches. Will buy again if I have other needs.

After we received these modules, we did full tests on them to make sure there were no performance issues and they passed all the tests. They have full compatibility with Arista 7160. I’m running these SFP28 modules on Arista 25G SFP ports without any issues as expected. Pleased with the FS account manager. I have repeatedly checked the information with my AM and got quick and helpful responses.

We were building up a 25G/100G network with some transceiver modules and 100G to 4x25G break-out DACs so as to bridge Cisco N9K-C93180YC-EX to Mellanox 4421/4121A-ACAT card.
At the very first beginning, I was a little skeptical about their performance. I doubted whether the third-party vendor can be compatible with our switches, so I checked the transceiver module with customer service and asked for the tests report and eye diagram of this module to confirm its functionality. Everything I got showed the products were exactly what I need. So I placed the order. Secure packaging arrived four days after I placed the order. No technical issues with the product. Everything communicated flawlessly at the speed it was expected to be. And FS customer service is good. I received e-mails from my AM after I got the package. That’s really caring and considerate. Everything goes well now, no complaints. I love these awesome transceiver modules.

Material já foi entregue e ainda recebo e-mails cobrando e também o imposto cobrado para entrega é altíssimo

We used to buy 1G/10G modules from FS, and this year we upgrade to 25G 100G project. They give me perfect solution and products, and confirmed every details, very nice! Good products! Good team! Will back again for my future project.

Once I received the 25G modules, I tested them, and all of them worked great, without any issues.

I used the transceiver soon after it came. There's no problem! Excellent!

They had the 25G SFP28 transceiver I needed, at a very fair price. The delivery was faster than expected and a nice package. Thank you! Looking forward to doing more business with you.

FS is always useful. Now we turn to 25G/100G deployment, and can find all the items we need here. We tested this 25G optic and it worked well. We've decided to purchase them in bulk for our DC.

Before bought the module, I was worried about the compatibility with my switch, so I purchase only two for test. It proved that there is nothing to worry about, I will purchase more soon.