We are interested in the 40G DACs, but not sure if they can work with our Cisco devices. The AM quickly replied and asked about our devices’ model, and ensured us the cable could work with my devices. Yeah, they did. This cable does a good job in connecting our switches and adapters. Everything works fine and no problems have occurred so far.

FS guys are always available to help and answer my questions. Thanks for their recommendation, the QSFP+ cable helps us achieve 40Gbps. Will deal with them again and recommend FS to people I know.

We would like to order 7m and 20m DAC cables. 7m was used for connecting the switch and network card in our controlling room, 20m was planned to connect another switch in the downstairs. But FS guys advised us to use 40G module and fibers to achieve 20m connection. He explained the transmission performance would be affected if we chose 20m DAC. We adopted the suggestion. All the DAC, modules and fibers had been used for a while without any problems.

In order to achieve direct connections for 40GbE, we planned to purchase a few DAC cables. The price advantage of FS's product is attractive, but compatibility is always our biggest concern. I was informed that all of their DACs are tested multiple times in mainstream original brand switches in their test center. So I chose to rely on them and bought some 40G DACs right after confirming. It turned out that they ARE fault-free to work with our Juniper QFX5100 series Ethernet switches, exactly as I expected. With NO flaws whatsoever!

I don't often do shopping online, but when it comes to fiber optical equipment, I will go to FS.COM. All of my network application devices are from you.

Buying from FS.COM has always been a straight forward experience. Good people, they know their products and always courteous.