Providing IT Pros with Fiber Optic Transceivers that work seamlessly with their network, have a lifetime guarantee and cost much less than the others. Your data center or enterprise network deserve the best- so get the best, TenFourOptics. TFO is based upon principles, not policies. Principles such as CUSTOMER SERVICE and VALUE. These principles are embedded in our day-to-day workings, and are the backbone of our business, something that will not change no matter how far technology advances.