N 国家重点实验室 2)Transmission medium Transmission medium can be categorized two kinds:wired and wireless Medium types Main features Twisted Pair XDSL (digital subscriber Line),2M~54 Mbps, let telephone user to access to Internet It usually refers to t the former,typical Cable (coaxial cable, application is HFC (Hybrid Fiber Coax),which electricity line) uses fiber between the service provider and residential zone,while employs coax within old residential buildings. It has been using widely in the form of EPON (Ethernet Passive Optical Network) in Optical fiber residential zone,connecting various routers or switches together. 182020/4/23 Dr. Zhanqi XU, National Key Lab on ISN, Xidian University 18 2) Transmission medium Medium types Main features Twisted Pair xDSL (digital subscriber Line), 2M~54 Mbps, let telephone user to access to Internet Cable (coaxial cable, electricity line) It usually refers to the former, typical application is HFC (Hybrid Fiber Coax), which uses fiber between the service provider and residential zone, while employs coax within old residential buildings. Optical fiber It has been using widely in the form of EPON (Ethernet Passive Optical Network) in residential zone, connecting various routers or switches together. Transmission medium can be categorized two kinds: wired and wireless