We need a large quantity of 10G optical transceivers for our new data center. Restricted by a limited budget and a tight schedule, I count on FS to provide a cost-effective solution for me. My account manager is rather professional and patient to answer all my questions, really nice conversations we have. I have to praise your fabulous customer services. And the modules were well-packaged and worked perfectly on our switches. Will recommend you to my friends in this field.