The UT-XGS5101 is a high-performance XGSPON Optical Network Unit (ONU), offering a 10 Gigabit Ethernet port plus one Gigabit Ethernet port for unparalleled speed and connectivity. The performance of the ONU directly dictates the service quality delivered to subscribers. Role. Ciena's WaveLogic 6 Extreme 1. With 10Gbps symmetrical transmission speeds, it seamlessly integrates with XGS-PON Optical Line Terminals (OLTs) to deliver high-speed, low-latency, and future-ready. Cisco's family of 10-Gbps symmetrical passive optical network (XGS-PON) Optical Network Terminals (ONTs) delivers flexible, high-performance broadband connectivity for a wide range of fiber-to-the-premises use cases, including residential spaces, Multidwelling Units (MDUs), Small Office/Home Office. Mitsubishi Electric Corporation, Integrated Design Center, Toshihisa Ogura, Atsuki Tachibana, Kamakura, Japan The optical network unit for ultra-high-speed fibre communication is used to connect outdoor optical fibres to an indoor network. The unit achieves a maximum speed of 10 Gbit/s for uplink. MAC (Medium Access Control) chip for OLT (Optical Line Terminal) in FTTH (Fiber To The Home) with 10G-EPON (10Gigabit Ethernet Passive Optical Network) MAC (Medium Access Control) chip for ONU(Optical Network Unit) in FTTH (Fiber To The Home) with 10G-EPON (10Gigabit Ethernet Passive Optical.