This example demonstrates an OptSim design for FTTH GEPON link. Here we consider typical GEPON FTTH design for downlink with 16 subscribers and 20-km reach. Passive optical network (PON) access architecture is the accepted choice of triple-play (voice, video, and data) service delivery from service providers to the end users in FTTH (fiber-to-the-home) access networks. Three major PON technologies are currently accepted as the basis for FTTH deployments: Broadband PON (BPON), Gigabit PON (GPON), and Ethernet PON (EPON or GEPON). GEPON architecture is specified by IEEE 802.3ah standard and supports Gigabit Ethernet 1.25 Gbps transmission rate for data component in both down- and up-link configuration.
In a PON, the active optoelectronics are situated on either ends of the passive network. An optical line termination (OLT) device is installed in the central office (CO), and an optical network termination (ONT) device is installed on the other end, in or near each home or business site. Fiber distribution is done using a tree-and-branch architecture.
The figure below depicts the layout for this example: