Very happy with the modules and services offered by FS.com. I ordered QSFP+ modules to fit for my computing networks. They can receive and forward without frame loss. Customer service was excellent, I had queries to the technical team about what I was ordering and to the sales team about the delivery, each time the response was helpful, accurate and professional.

We always have a wonderful shopping experience here. We were looking for some 40G transceivers with low power consumption of less than 4.5W for our Cisco ASR 9000 Series switches. Then our Account Manager gave us a quick response and recommended the QSFP+ UNIV and QSFP+ SR modules. Considering the existing LC cables we have, we chose the first solution and ordered twenty QSFP+ UNIV transceivers. We were happy they came without breakage. FS always does a good job of packaging and delivery. We plug them into our switches and they are recognized immediately. As they are supposed to be, they are plug and play as well as fully functional in our Cisco switches. No compatibility problems so far. They have worked flawlessly and operated at a full speed, no packet loss or interface issues or anything like that. Much thanks to FS!

This isn’t the first time I've ordered fiber optic products here. The services they provided were out of my expectations every time. All FS guys were very enthusiastic, professional and gave me a quick response to every problem I encountered. Also the modules can work flawlessly with my Cisco gear. Five stars!

Good 40GBASE-UNIV modules. Work well with MMF and SMF cables in our Arista 7160. We have been buying transceivers here for years. They always arrive on time, packaged well, at a great price and unbeatable warranty.

Products shipped promptly and packaged well. I have used these modules for about ten days, and so far, excellent performance/reliability. No complaints or issues whatsoever.

We have a Cisco Nexus 7010 switch which serves as ToR switch in our data center. As we have had bundles of LC multimode fiber cables, we’d like to buy some multimode 40G QSFP+ with LC interfaces.
After checking on the web, we noticed that nearly most 40G SR transceivers are designed with MTP or MPO connector. So we consulted fs personnel. As they recommend me, two types of modules, BiDi and LX4 were all available. We checked the specifications of our switches and then bought LX4 modules.
Shipped quickly as expected. All the transceivers were well packed in the hard plastics. The socket is nice and tight. Plugged them into 40G ports and connected up the ports on switches, they worked like a charm. I will buy more next time when I need more transceivers.