Hitech Optical Fiber on Instagram: "the architecture of a Fiber to the X (FTTx) optical access network, commonly used in PON (Passive Optical Network) systems. Explanation in English : The network starts at the Central Office ( CO ), where the Optical Line Terminal ( OLT ) is located. The OLT sends and receives optical signals over a single fiber. From the central office, the signal travels through the backhaul span ( up to 100 km ) toward a remote node. This remote node contains a passive optic