When hanging the optical cable, the cable tray should be set first, and the big pulley for laying the optical cable shall be fixed on the pole at the up and down positions. Outdoor cable may be direct buried, pulled or blown into conduit or innerduct, or installed aerially between poles. Indoor cables can be installed in raceways, cable trays above ceilings or under. In fact, there are two methods for aerial optical cables laying: one is "fixed-pulley traction method", including "manual traction method" and "mechanical traction method"; the other is "cable tray moving and releasing method". Next, we will take a detailed look at the concrete operation of the. Intermediate pulls require pulling the cable to a point, laying on the ground in a " figure 8 " pattern to prevent putting a twist in the cable, then pulling the next section. Care should be taken to not pull cable around courners too tightly, with a minimum bend radius of 20 times the cable. Outdoor fiber optic cables are designed to withstand harsh environments, including moisture, extreme temperatures, and physical stress. Based on installation methods, outdoor fiber. 1. Individual company practices for placing. xcessive pulling, bending, and crushing forces. Do not bend the cable more s arply than the minimum recommended bend radius.