Our business has expanded greatly this year, we considered extending and upgrading our network in a comprehensive way at the end of this year, so it can provide a better service next year. To upgrade our existing 10G network to a 40G one, we also hoped the original ubiquiti 10G switches, connected with dell servers, can be fully used. After all, replacing all the 10G devices would be too much costly for us. The problem was we had already had 40G nic cards. We wondered if it was possible that those 40G nics can be used together with these 10G switches.
After describing our confusion, my account manager told us there were three solutions to solve it. They also confirmed our network environment and the transmission distance about the devices needed to be connected. Based on that, he also pointed out the most economical solution for us was to use 40G dac cables. Since our transmission distances were no longer than 5 meters, using transceivers together with mtp break out cables or transceivers together with optical cables and qsa adapters would both be more expensive. This was the most considerate and professional service we had ever had. Because of that, we bought their product without any hesitation.
Now, we have used their products for a while. Everything goes well just as we had expected.

I got this DAC cable to use as an uplink from my Cisco 10G switch to my Cisco 40G switch.
The cable is fully compatible and able to get my QSFP+ link up. Overall, decent cable for the price.

Need some DAC breakout cables to connect to our CISCO switches. Since we had a tight budget, we couldn't spend money on the original brand cables. So I browsed some pages from FS to find a cable that can meet our demands. Then I bought some of these breakout cables after confirming with my AM. Completely compatible with our 40G CISCO Ethernet switches. No hassle in terms of achieving the speed and performance. Still got surprised by this high-quality product at a reasonable price. In our following project, FS will be considered as our first choice definitely.

NICE PRODUCT WITH NICE PACKING & TIMELY DELIVERY

I highly recommend this company, they sales great quality products and they ship it immediately.

For a specific application, we had a need to breakout Intel XL710 cards and connect them to a Brocade switch, but all standard cables were vendor-locked on both sides, putting us in quite the conundrum. These cables were a literal life-saver.

We have test the 40G-4X10G DAC cable, it’s working. No problem.
This is my first shopping experience with FS and know FS can customize code according to different equipment type. Great enough for me.

I was looking for the QSFP+ to SFP+ DAC on different websites and didn't find one that comes to my satisfaction until I saw the product on FS.COM. First, the price attracted me, and when I looked into the details, the strong test assured program makes me assured of the quality. Reliable vendor.

I spent a ton of money on an original brand cable, but there's really no need.
I was surprised at the high quality and superior construction of this cable at such a low price.
It works perfectly, and I'm confident that it would perform just as well in the days to come.

I have ordered some these cables from FS.COM, and used them extensively on nexus 3000/9000 platforms, all performed perfectly. I have also installed them on Cisco catalyst switches, everything seems great. I have tried some other non cisco brands and ran into intermittent cable issues, so now that these have worked well for us, this is all we order.