An optical line terminal with multi-parameter on-line monitoring function

Abstract

The present invention provides an optical line terminal with multi-parameter online monitoring function, which includes a chassis and a fan module located inside the chassis, a power supply module, a main control board, an uplink board, a service board, a backplane connector, a laser, a first coupling device, intensity modulator, circulator, optical switch, second coupler, analysis module, data acquisition and processing board, control unit, wavelength division multiplexer and optical fiber lines, through which the communication optical signal and the distribution The Brillouin scattered optical signal is injected into the optical fiber line at the same time, and the communication optical signal and the Brillouin scattered optical signal are reversely demodulated. Finally, while the communication task is completed, the attenuation information of the optical fiber, the temperature information and the stress information along the line are monitored online. The invention adopts the Brillouin optical time domain reflection technology, and can obtain more environmental parameters after calculating and analyzing the obtained multiple parameters, so as to provide data support for the line switching and bandwidth allocation of the optical line terminal.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an optical line terminal with a multi-parameter online monitoring function. Background technique [0002] An optical line terminal (optical line terminal, OLT) is an important part of a passive optical network, and it communicates with an optical network unit through an optical distribution network. The optical line terminal broadcasts Ethernet data to the optical network unit, and the optical network unit transmits data to the optical line terminal according to the time slot and sending window configured by the optical line terminal for sending data. The management unit of the optical line terminal monitors the status of the optical line terminal equipment and ports, and the uplink optical power of the optical network unit in real time, and performs line switching in time when the uplink optical power exceeds the limit or an optical link failure is diagnosed. [0003] In ...

AI Technical Summary

Problems solved by technology

Although the OLT can periodically or intermittently put the ONU in the power-saving mode before performing the OTDR test, the OLT needs to occupy additional time slots to monitor without affecting the communication of other lines, which reduces the system communication rate. When the number of ONUs in the PON system is large, it is difficult to ensure that the detection period of the OTDR is synchronized with the switching period of the ONU

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