Relationship between OLT and ONU

OLT: It refers to the optical line terminal we use, and is also the final terminal equipment used to connect the optical fiber trunk.

ONU: ONU refers to an optical network unit. ONU is mainly divided into active optical network unit and passive optical network unit. Generally, the equipment equipped with network monitoring including optical receiver, uplink optical transmitter and multiple bridge amplifiers is called “optical node”.

OLT is the office equipment in EPON passive optical network system. It is a multi-service providing platform, which can support IP services and traditional TDM services at the same time. It is a device placed at the edge of the metropolitan area network and at the exit of the community access network, which can converge access services and deliver them to the IP network respectively.

The ONU 1001i uplink connects to the central office through the GEPON port, and the downlink can provide gigabit Ethernet ports for individual users or other users. As the future solution of FTTx, ONU 1001i provides powerful voice, high-speed data and video services through single-fiber GEPON. ONU function: select to receive data sent by OLT; Respond to ranging and power control commands sent by OLT; And make corresponding adjustments; The user’s Ethernet data is cached and sent to the uplink direction in the sending window allocated by OLT.