Cisco CWDM-SFP10G-1270 Compatible 10G CWDM SFP+ 1270nm 40km DOM Duplex LC SMF Transceiver Module

We are seeking for some cost-effective SFP+ CWDM modules for our project to support 35km transmission. I've found that one CWDM case from FS Twitter has a similar situation with our current project. Since the network solution that they design for that case is pretty nice, I tried to consult with the AM to get some advice. The FS technical team helped us to check our link plan and even revise some details in our existing diagram, like calculating the fiber loss and confirming the modules' compatibility. Really appreciated the professional advice and considerate assistance of you guys. The modules that you recommended worked flawlessly on our switches, which are optimal for our 10G network. Thanks for your support!

Considering the financial cost, we gave up the transceivers from the original brand and decided to pick third-party transceivers from a reliable supplier. One of our friends recommended FS to us, and we found that the merchandise is fairly priced. Therefore, we bought 40 pcs of the 10G optical transceivers. Compatibility used to be our biggest concern. However, these modules are fully compatible with our Cisco switches and have been working perfectly without any problems till now. No complaints whatsoever.

First purchase from fs.com. There was no problem in appearance (no scratches or no sign of being used) when the modules were received, and even the packaging was intact. The modules worked well with our Cisco Nexus 5000 and Cisco 3850 without problems. Considering buying other products from them as well.