During the commissioning process, it is necessary to ensure that the input optical power of the OTU board is lower than the overload point to avoid burning the optical module or affecting…

During the commissioning process, it is necessary to ensure that the input optical power of the OTU board is lower than the overload point to avoid burning the optical module or affecting performance. In particular, the overload point of the PIN optical module is very low. Before the actual optical power is measured, the optical fiber is required to be inserted or not inserted.