84Appendix E Cabling recommendationsWhen an S10500 switch is mounted in a 19-inch standard cabinet, the interface cables are routedthrough the cable management brackets, bound at cabling racks on chassis sides, and then routed up ordown to pass through the chassis top or the raised floor, depending on the available equipment roomcondition. The power cables run along the two sides of the chassis and out of the chassis either from thechassis top or the raised floor depending on the equipment room conditions (power distribution cabinet,lightning protection box, and connector strip, etc.) of the exchange office.General cabling requirementsMinimum curvature radius of cables• The curvature radius of a fixed power cable, communication cable, or ribbon cable should be atleast five times the cable’s outer diameter. If the cable is frequently bent, plugged and unplugged,the curvature radius should be at least seven times the cable’s outer diameter.• The curvature radius of an ordinary fixed coaxial cable should be at least seven times of the cable’souter diameter. If the coaxial cable is frequently bent, plugged and unplugged, the curvature radiusshould be at least 10 times the cable’s outer diameter.• The curvature radius of a high-speed cable (for example, SFP+ cable) should be at least five timesof the cable’s outer diameter. If the coaxial cable is frequently bent, plugged and unplugged, thecurvature radius should be at least 10 times the cable’s outer diameter.Minimum curvature radius of fibers• When the fiber is wrapped up around the cabling plate, the diameter of the cabling plate shouldbe at least 25 times the fiber’s diameter.• When the fiber is being moved, the curvature radius of the fiber should be at least 20 times thefiber’s diameter.• When the fiber is fixed, the curvature radius of the fiber should be at least 10 times the fiber’sdiameter.NOTE:The fiber’s diameter refers to the outer diameter of the fiber jacket. Typically, the diameter of a single-corefiber is 0.9 mm (0.04 in), 2.0 mm (0.08 in), or 3.0 mm (0.12 in).Correct use of labelsBefore binding the cables, fill in the labels for them correctly and stick them to the right position on thecables.Cable management requirements• Bind and put the cables inside the cabinet in an organized manner. Make sure the cables do nothave any kinks or sharp bends.