The central office (computer room) OLT is the core of the entire PON system. It provides high-speed interfaces for voice, data and other information access upwards, and PON interfaces for passive optical distribution networks downwards. The OLT is the control center of the PON system, through which the network management system completes the operation, management and maintenance of the PON system.
The CATV module uses a front-end amplifying optical transmitter, and the output optical signal is connected to the combiner through an optical splitter.
The combiner device is a passive device that multiplexes the PON upstream and downstream signals and the CATV downstream signals, and is installed between the OLT and the ODN.
The user terminal ONU provides service interfaces such as data, CATV video and telephone for users. The CATV service data is output to the RF interface, connected to the STB (Set Top Box), and then connected to the TV for program viewing.
The ODN network between the OLT and the ONU is a passive optical distribution network composed of optical splitters and optical fibers. Its function is to complete the distribution and aggregation of optical signals, so that the downstream data is distributed to each ONU terminal, and the upstream data is converged. to the OLT device. ODN networks can implement multi-level splitting according to the actual use environment.
Related products:
GPON ONT: data+CATV type, data+voice+CATV type, data+CATV+WiFi type
EPON ONU: data+CATV type, data+voice+CATV type, data+CATV+WiFi type
