A method and device for protecting power over Ethernet
A power supply protection and Ethernet technology, which is applied in the field of communication electronics, can solve problems such as MOS tube abnormality and power supply abnormality, and achieve the effects of reducing failure rate, improving positioning, and improving application reliability
Active Publication Date: 2021-07-16
RUIJIE NETWORKS CO LTD
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Problems solved by technology
[0010] The embodiment of the present invention provides a power-over-ethernet protection method and device to solve the problem in the prior art that the PSE chip controls the MOS tube to turn on the loop to supply power or power off, resulting in an abnormal power supply due to an abnormality in the MOS tube
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[0042]In view of the problem in the prior art that the PSE chip controls the MOS tube to turn on the loop to supply power or power off the power supply, the MOS tube is abnormal and the power supply is abnormal. The Ethernet power supply protection method provided by the embodiment of the present invention is applied to the Ethernet Power supply, the power supply equipment realizes the power supply and shutdown of the power receiving equipment by controlling the on-off of the MOS tube; the flow process of the method of the present invention is as follows figure 2 As shown, the execution steps are as follows:
[0043] Step 21, detecting the level signal of the MOS transistor;
[0044] Two voltage divider resistors can be connected in series between the D pole of the MOS tube controlled by the power supply equipment and the positive pole of the power supply voltage of the power supply equipment; here, for the convenience of expression, the two voltage divider resistors are reco...
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The invention discloses a protection method for power supply over Ethernet, which includes: applying to power supply over Ethernet, power supply equipment realizes power supply and shutdown of power receiving equipment by controlling the on and off of MOS tubes; the method includes: detecting the The level signal of the MOS tube; according to the level signal, obtain the corresponding level logic parameter; obtain the control information of the power supply device for the MOS tube; analyze the level logic parameter and control information; when the When the state of the MOS transistor represented by the level logic parameter is different from the control state of the MOS represented by the control information, an alarm is issued and a protection mechanism is triggered. The embodiments of the present invention can solve the problem in the prior art that the PSE chip controls the MOS transistor to turn on the loop to supply power or power off, resulting in abnormal power supply due to abnormality of the MOS transistor.
Description
technical field [0001] The invention relates to the technical field of communication electronics, in particular to a Power Over Ethernet (PoE) protection method and device. Background technique [0002] PoE refers to the fact that the existing Ethernet cabling infrastructure can be guaranteed to be used for IP phones, wireless access points (Access Point, AP), security network cameras and other IP-based devices without any changes. While the terminal transmits data signals, it can also provide DC power supply for such devices. PoE technology uses a common Ethernet cable to transmit Ethernet signals and DC power according to different frequencies, integrating power and data into one Ethernet cable. [0003] A complete PoE system includes two parts: Power Source Equipment (PSE) and Powered Device (PD). PSE is the manager of the entire POE power supply process, and supplies power to PD through Ethernet. The power supply process is as follows: [0004] 1. Detection process. ...
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IPC IPC(8): H04L12/10
CPCH04L12/10
Inventor 潘景文
Owner RUIJIE NETWORKS CO LTD