Impact: The optical module may be burned out due to continuously high received power. Reason: Possible causes are long distance optical module for short distance transmission, the opposite end of the module luminous abnormalities, this end of the module receiving. In fiber-optic communication systems, long-distance optical modules, due to their high transmit optical power, are highly susceptible to damage to receiving devices when directly connected to shorter optical fibers. This article analyzes the mechanisms of optical power overload, typical damage. Monitoring optical power levels is essential because even slight deviations can significantly affect the stability, quality, and availability of optical transmission services. Optical networks rely on precise power balance—too much power can damage receivers or distort signals, while insufficient. Optical transceivers as an accessory product might be damaged during use, including natural damage and man-made damage. The factors of natural damage are very simple, generally the optical module has reached its service life, natural aging, components fail or run at poor performance. The possible causes of optical bore contamination and damage are as follows: The optical bore is exposed. The article Digital Diagnostic Function (DDM) For Optical Modules describes that DDM function can be used for real-time monitoring and fault location of the module's working status, in which the optical module's transmitting optical power and receiving optical power are the key parameters for. There are multiple ways that optical modules fail in common ways that can interrupt network connectivity.