What does the door indicator light mean when it is off, always on and flashing?

The indicator light at the door head is off, on and off, indicating that there is something wrong with the circuit. If the led light still flashes after being turned off, it may be that the zero line and the live line are connected backwards. At this time, just reconnect the neutral wire and live wire of the switch socket.

The led light is flashing, and there is something wrong with the driving power supply. For example, if the lamp bead does not match the driving power supply, a suitable driving power supply can be replaced. Or the heat dissipation performance of the lamp is not good, which leads to the high temperature of the lamp, and the driving power supply turns on the overheat protection function. Coating heat dissipation coating on the lamp shell can enhance heat dissipation.

transceiver

Optical fiber transceiver is an Ethernet transmission and conversion unit that exchanges short-distance twisted pair electrical signals with long-distance optical signals, also known as photoelectric converter. Optical fiber transceiver extends the connection distance of Ethernet and breaks the distance limit that twisted pair can only transmit 100 m, so it is widely used in the network environment using long-distance optical fiber.

With the increasing application of optical fiber transceiver, it has become a more important fault point in the network. The fault can be quickly judged by whether the indicator lamp of the transceiver is normal or not.