Zyxel is committed to taking responsibility on environmental improvement to international rules, requirements, and standards; this is regarded as a primary task and a basic corporate duty. Zyxel initialized and proceeded with ADSL CPE series product LCA. This was verified by the qualified third party Environmental and Development Foundation against the requirements of "ISO 14045 Environmental labels and declarations—Type III environmental declarations—Principles and procedures."
An environmental product declaration (EPD) defines and provides quantitative descriptions of the environmental performance of a product based on selected the category parameters from ISO 14040 series standardizations; it does not, however, eliminate other environmental information for company. The rules for environmental impact elements and computation of correspondence parameters for product category rules (PCR) shall be constructed before verifying the EPD for the selected category. Using EPD methodology and ISO standards, focal points shall be defined and declared, such as: