So what about the optical cables? Our PDO optical cables deliver exactly what their name implies: Pure Digital Optical. A quick look will immediately show that they differ from common grade optical cables thanks to a precision connector that has the size and strength to deliver superior connections. On the inside, our PDO cables use heavy metal free, high-grade polymer optical fibers that take advantage of high-speed communications-reflecting technology in the optical layer. This means that they are low-loss and deliver reliable, high speed, wide frequency connections.