A fiber pair refers to two optical fibers bundled together within a cable, commonly used in telecommunications and networking. One fiber in the pair is dedicated to transmitting data signals, while the other is used for receiving data, enabling full-duplex communication. This arrangement allows for simultaneous two-way data transfer, which is essential for high-speed networks such as those used in data centers, internet backbones, and enterprise environments. Fiber pairs are fundamental in long-distance and high-capacity network infrastructures due to their ability to support large bandwidth and low latency. Their use ensures reliable and efficient data transmission over significant distances.