AFL's ADSS (All-Dielectric Self-Supporting) fiber optic cable is designed for aerial installation without the need for messenger wire. However, for many procurement managers at Electric Co-ops and Utilities, the problem isn't finding a. Used by electric utilities on transmission lines with the voltage of 35 kV and higher for creating optical communication lines and protecting the power lines from lightning strikes. Flex-Span ADSS expands on AFL's single jacket ADSS portfolio.