This product is used very well.

There are 2 QFX5100 switches and one Dell server in our company host, this month we need to add some access devices and I find FS S3900-48T4S 48-Port 10/100/1000BASE-T Gigabit switch seems to be a nice option because the 10G uplink port can be connected to our QFX5100, the distance between them is about 7 meters. The AM manager recommended me to use 10G modules and fiber cables for the connection between the S3900 and the QFX5100 switch. And the Intel E10GSFPSR dual-rate compatible module was recommended to connect the Inter X520 SFP+ card in the Dell server with the QFX5100 switch, I placed my order according to her suggestions. The Gigabit switch and optical modules arrive on time and the installation has finished, with no errors of those Intel compatible modules, as well as the S3900 Gigabit switch.

FS.COM is my go-to company for fiber products. I have purchased cable, enclosures, modules and tools from FS.COM and I have never been disappointed. Ellen Wang is my rep - she is the greatest!!!

Best supplier!

Dell (Intel) and other modules would not work in this card. Only an intel module I had worked.

Then, I saw a post about FS.com and this module on a forum and gave it a try. Two days later, it arrived and works perfectly! Awesome!

I wanted to link a pair of 10Gbit ethernet cards. Both were effectively Intel X520-SR2 cards, one being badged DELL. They were fitted, one to a DELL win 10 PC and the other to a generic Win 7 PC. Both cards were fitted with good quality SFP+ optical transceiver units, type Finisar FTLX8571D3BCL. On installing Intel drivers, both cards showed their two channels with a warning yellow ! mark and did not work. I had heard rumours that the Intel cards would not work without genuine Intel SFP+ units, but the part number was so close to the Intel FLTX8571D3BCV-IT that I thought they stood a good chance. It seems that Intel have some code in their drivers that disallow anthing but their brand SFP+ units. From the point of view of support and business, you can't blame them for this.

However, I got the cards at a reasonable price and I really couldn't afford to spend hundreds of EU on transceivers. The mention of "FS.com is your friend :)" on a forum took me here and I saw straight away that FS can supply SFP+ transceivers to suit many different manufacturers requirements, so I bought a set of Intel compatible for both boards . The price was extremely good for the units and the shipping which bought them from Germany to the UK in 2 days.

I fitted all 4 units and both cards burst into life, in that device manager now showed two normal functioning channels on each board. Also, all the normal Intel parametrs are available as shown in the attached screenshots. I fitted a short OM3 fiber optic lead between the two units and after a bit of configuration had a 10Gbit network up and running. Full marks to FS. FS really is your friend :)

Received product in 2 days! Thank you.

Using with Supermicro AOC-STGN-i2S network card (Intel 82599 controller) and works perfectly.

Fiberstore is our preferred supplier for all our Fiber Optics and related items. The sales team, Miss Ellen is such a lovely to work with especially during urgent times, she would go extra mile to ensure to meet our critical deadline. The product has been working as advertised and their pricing is one of the best.

Exceptionally happy with FS quality, service and prices, it is the obvious and simple choice for our optic needs.