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无源光网络(PON,Passive Optical Network)采用无源光分/合路器或光耦合器分配/汇聚各光网络单元(ONU,Optical Network Unit)信号的光接入网。PON系统系由光线路终端(OLT,Optical Line Terminal)、光分配网(ODN,Optical Distribution Network)、光网络单元(ONU)组成的信号传输系统,简称PON系统。目前主流PON综合接入系统根据采用的技术分为以太网无源光网络(EPON,Ethernet Passive Optical Network)和吉比特无源光网络(GPON,Gigabit-capable Passive Optical Networks)。
Passive Optical Network (PON) An optical access network that uses a passive optical splitter / combiner or optical coupler to distribute / aggregate optical network unit (ONU) signals. The PON system is a signal transmission system composed of an optical line terminal (OLT), an optical distribution network (ODN) and an optical network unit (ONU), and is referred to as a PON system for short. At present, the mainstream PON integrated access system is divided into an Ethernet passive optical network (EPON) and a Gigabit-capable passive optical network (GPON) according to the adopted technologies.