In a passive optical network (PON), the optical line terminal (OLT) is a hardware device that acts as an endpoint in the network. Modern OLTs offer communication service providers (CSP) the ability to launch multigigabit services to tens of thousands of subscribers from a single location or just ten. This solution not only uses the advanced features and capabilities of the Cisco routers but also capitalizes on the cost. In modern communication networks, optical line terminal (OLT) is the core device to realize point-to-multipoint (P2MP) in passive optical network (PON) architecture. In addition, the transmission between OLT and ONU/ONT adopts an optical.