The string is just string - it's there for mechanical reasons, to support the cable during winding and to provide strain resistance. This is the customer lead-in kit. The conduit goes though the wall & the white cover clips over the grey circular part which fits over the conduit from the inside so all you'll see is the white cover in your room. I was expecting to see, inside the cable jacket, four wires, each one in a wire insulation. A sort of an orange/gold. Behind the scenes, a mysterious yet crucial component often goes unnoticed - the white powder nestled within these cables. Cable filling. Dirty connectors are one of the major problems in fiber optics, causing high connector loss, high reflectance and contaminating transceivers. Network operators claim that 15-50% of all network problems can be traced to dirty connectors causing connection problems. The procedures in this document describe basic inspection techniques and processes of cleaning for fiber optic cables.
