Last September, Subnet Services started offering two new courses, one of which is the Certified Fiber Optics Network Design (TEL2007). CFOSD is a three-day program about the process of fiber optic design and its implementation. It explores the facets of designing fiber optic networks – from choosing components, proposed routing, testing, and documenting to creating a plan and managing installation. But before we discuss this course deeper, let us tackle first the importance of a network design plan.