1. The optical interface of the equipment room emits low or no light, causing the optical cat of the client to work abnormally. If the signal light fails to receive the optical signal from the optical cable or the power of the optical signal is too low, the optical cat cannot shake hands with the equipment room normally.
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2, cable failure (including the splitter is bad), will also cause the light cat can not receive light or receive light is too low, this time the signal light will also shine or red light warning;
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3, the light cat itself failure, partial damage to the light collector will also cause this phenomenon;
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4, server failure, such as server maintenance will cause a red light. No matter which of the above four conditions appear, the user can not solve the basic, can only call the obstacle. Finally, I called the number 10000 to the telecom customer service, they arranged personnel to come and repair, gave me a line, made an optical fiber head, and then I can surf the Internet; The above is about the introduction of the router optical signal flashing red, it should be noted that the above problems can not be solved personally, and can only be repaired by the operator. I hope the above introduction can solve your problem.
This is a failure of the external network connection. You can plug and remove the optical fiber port first. If the fault persists, contact the carrier.