Optical line terminal interface device and its fault protection and energy saving method

Abstract

The invention relates to an optical line terminal interface device. A state control port of a main transmit-receive module is connected to enabled ports of an energy saving control module and a protection control module respectively. A control port of the energy saving control module is connected to energy saving dormancy / starting enablement ports of a line monitoring module and a standby transmit-receive module respectively. A control port of the line monitoring module is connected to the enabled port of the protection control module. A control port of the protection control module is connected to an optical switch control port of a protection switching apparatus. A data communication port of the main transmit-receive module is connected to a port of an optical switch on a protection switching apparatus through a work fiber and a wavelength division multiplexer. The wavelength division multiplexer is connected to the line monitoring module through the work fiber. A data communication port of the standby transmit-receive module is connected to the port of the optical switch on the protection switching apparatus through a protection fiber. In the invention, a fiber line and the main transmit-receive module are protected; network reliability is increased; the line monitoring module and a standby optical transmit-receive module are controlled in real time and equipment energy consumption is reduced.

Description

technical field [0001] The invention relates to an optical line terminal interface device and its fault protection and energy-saving methods, belonging to the technical field of optical fiber communication. Background technique [0002] With the increasing demand of users for network broadband, passive optical network (PON) technology can effectively guarantee the "last mile" access broadband, and is one of the main technologies to realize the next-generation broadband access network. PON includes optical line terminal (OLT), optical network unit (ONU) and optical distribution network (ODN) and other parts. Among them, the optical line terminal (OLT) is located at the central office, the optical network unit (ONU) is located at the user end, and the optical splitter realizes point-to-multipoint optical power distribution, and is connected to multiple optical distribution networks (ONUs) through multiple branch fibers. ). The backbone optical fiber, optical splitter and bra...

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