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Testbed laboratory for the physical analysis of gigabit passive optical access networks (GPONs)

Telecom engineering students should face important challenges in their careers regarding next-generation networks. In fact, in the last few years optical access networks are leading an important revolution in the network sector. Passive Optical Networks (PONs) based on the Ethernet (EPON) and the Gigabit (GPON) protocols are the most deployed optical access networks around the world. Therefore, Universities should join to this revolution permitting their students to train and to learn these innovative and recent technologies so that they have the chance to develop and to improve some required skills for their future. Consequently, we deployed a real GPON testbed in a laboratory where students can research. In the first approach students have to analyze issues regarding the physical layer of the GPON testbed. In fact, they have to test eye diagrams, Q factors, rise/fall times of transmitters and extinction ratios. Furthermore, they have to discover and analyze the events (connectors, fusion splices, attenuation) at the optical links of the access network using an Optical Time-Domain Reflectometer (OTDR). Besides, the GPON is being prepared so that students can deal in other lab sessions with its configuration and management.