The optical module temperature grade is a crucial factor in ensuring stable and reliable network performance. – Extended grade (-20 –85°C) offers flexibility for semi-controlled outdoor environments. Why are optical modules divided into so many temperature grades, and what are the differences among them?Optical modules can be categorized into commercial grade (0℃~70℃), extended grade (-20℃~85℃), and industrial grade (-40℃~85℃) according to the different operating temperature ranges. The corrosion resistance of the plug 2. Dimensional tolerance. The most basic working conditions of industrial optical modules are that they must meet the requirements of -40℃ and 85 ℃. Commercial Grade Optical Transceiver.