ONU (optical network unit) long luminescence detecting circuit, application system as well as application method of ONU long luminescence detecting circuit and application system

Abstract

The invention discloses an ONU (optical network unit) long luminescence detecting circuit, which comprises a RC (resistance-capacitance) filter circuit, a current discharge circuit, a current limiting resistor and an output control circuit. The invention also discloses an ONU long luminescence application system, which comprises the ONU long luminescence detecting circuit, a CPU (central processing unit), a power supply control circuit and an optical module. The invention also discloses an application method of the ONU long luminescence detecting circuit and the application system. The ONU long luminescence detecting circuit, the application system and the application method have the following advantages or beneficial effects that 1, the problem of time control contradiction of the RC filter circuit is effectively solved; 2, the problem that the current is overhigh because the duty ratio is unstable so that the CPU takes for already catching long luminescence signals is effectively avoided; and 3, the RC filter circuit is applied so that the CPU carries out ONU deregistering only when an ONU is really in a long luminescence state, and the influence cannot be generated when the ONU normally works.

Description

technical field [0001] The invention relates to a long-light emission detection circuit of an Optical Network Unit (ONU for short), which belongs to the technical field of photoelectric detection, and in particular to an ONU long-light emission detection circuit, an application system and an application method thereof. Background technique [0002] Ethernet-based passive optical network (EPON for short) is a point-to-multipoint optical fiber access technology. The so-called passive means that the optical distribution network does not contain any electronic devices containing electronic power sources. A passive optical network includes an optical line terminal (Optical Line Terminal, OLT for short) installed in the central control station, and a batch of supporting optical network units (ONUs) installed in the user's place. The ODN (Optical Distribution Network) between OLT and ONU is composed of passive devices such as optical fibers and optical splitters, and does not requ...

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Problems solved by technology

[0008] In view of the above-mentioned problems, the present invention discloses an ONU long-light emission detection circuit, an application system and an application method thereof. When the ONU is detected to be in the long-light emission state, it avoids the problem that it always occupies the upstream channel and causes other ONUs to be unable to communicate with the OLT.

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