I appreciate your solution that made it possible for me to establish a 400G to 100G connection.

I have tested the modules in a test environment, and it worked very well.

Hope you had a great weekend. I have received the package and put some of the optical transceivers to use. The 400G modules are working as expected and we don’t have any issues at the moment. We are very happy with the quality of your product.

Thank you for following up. We have received modules. Your website and service is excellent. Thanks.

They perform well, and seem to be reliable, and great value.

Yes. Everyone was received and tested OK. Thank you. I will keep FS in mind if I need anything more in the future.

Thanks for the concern, and your always quick and polite responses to orders and questions. I really love your products, quality, prices, and delivery. And especially the perfect guide for ordering exactly what you need.

I have put the two transceivers to work, and they are working well. I’m using these in a personal environment rather than professional, but I will likely be buying more in the near future.

You’ve got some fantastic products and unbeatable customer service.

Several 400G optical transceivers were needed since we'd like to conduct a trial 400G connection between our Cisco Nexus 3000 switches. I confirmed with my account manager about the compatibility issues before placing the order. These QDD-DR4-400G-Si transceivers worked perfectly on our switches. No compatibility problems so far.