Loose-Tube Cable

In a loose-tube cable design color coded plastic buffer tubes house and protect optical fibers. A gel filling compound impedes water penetration. Excess fiber length (relative to buffer tube length) insulates fibers from stress of installation and environmental loading.

Buffer tubes are stranded around a dielectric or steel central member, which serves as an anti-buckling element. The cable core, typically uses aramid yarn as the primary tensile strength member. The outer polyethylene jacket is extruded over the core. If armoring is required a corrugated steel tape is formed around the single jacketed cable with an additional jacket extruded over the armor. Loose-tube cables are typically used for outside plant installation in aerial, duct and direct-buried applications.

November 11, 2011

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