For application scenarios in certain special industries, such as pulp and paper, water/wastewater treatment, mining, tire and rubber manufacturing, communication products need to be deployed in corrosive environments while ensuring long‑term stable and reliable communication services. These harsh industrial environments impose stringent reliability requirements on communication equipment. The GIGALIGHT 100G QSFP28 CWDM4 rugged optical transceiver features surface treatments against moisture, salt spray and mold, which mitigate or eliminate adverse impacts of harsh environments on product performance and reliability.