I just received the shipment, and the transceiver modules worked right out of the box.
Thanks for good service and fast handling.

Colis bien emballé, bon produit conforme à la description, tout est bien.

Not sure whether the module could work under the environment with a temperature below 0°C. The AM told us that it can work on a wider temperature range from -40°C to 85°C. So we made an order and my Cisco Nexus 93180YC-EX switches could read their RX and TX powers. Worked well and no issues at all. Good for outdoor usage.

Bought these Cisco compatible modules for handling high temperatures. These 3rd party modules surprised me. They worked like a charm on Cisco switches and we didn’t see anything different between its performance and Cisco’s. Dare to say it is the most powerful 3rd party module I’ve used.

I purchased this product for linking between 100G Ethernet switches on our factory floor. These modules perform as they are stated. They provide a wide range of operating temperatures. There is no issue connecting them with our cisco switches. Until now everything runs normally. Wish these modules can be durable.

Over the years, I’ve bought lots of transceiver modules with multiple data rates from several vendors, but the experience working with fs.com is really great. These 100Gbase LR4 QSFP28 are indeed industrial ones with decent and robust performance. No complaints about them.