Optical transmission apparatus and method for controlling variable optical attenuator

摘要

An optical transmission apparatus including a variable optical attenuator is provided. The optical transmission apparatus includes a module detection portion for detecting a type of module that receives light attenuated by the variable optical attenuator; and a variable optical attenuator control portion for controlling so as to change control parameters of the variable optical attenuator in accordance with the type of module detected by the module detection portion.