This new cable design, enjoying growing acceptance in recent years, incorporates several advancements in materials technology. The alternative to transitioning between different types of cable is through the use of a relatively new class of cabling that meets both indoor and outdoor requirements. Once the termination is completed, transitions must be protected with either a cabinet or a splice case, requiring additional space in the premises and incurring costs for the housings. In the final termination, all fibers must either be spliced to pigtails or fed through the tubes of a breakout kit if connectors are used. It is necessary to individually clean each fiber to remove the gel. This fiber type is well suited for campus environments where a single fiber cable can be used among buildings. The use of indoor/outdoor fiber cable can simplify fiber networks, eliminating transitions and splice points at building entrances. Care must be taken in handling the cable to avoid damage to the individual 250-micron-coated fibers while removing the gel. This loose-tube type of cable is difficult to splice or terminate due to the gel fill and requires extensive fiber handling. Loose-tube gel-filled cable is normally used for outdoor runs, while tight-buffered cable is used indoors. Likewise, cable designed for use in the premises does not meet environmental specifications and is generally not suited for the stresses encountered outdoors. This transition is necessary because traditional fiber-optic cable capable of withstanding the outdoor environment does not meet NEC standards for flame retardancy and smoke. With the use of a traditional fiber-cable arrangement in the premises, National Electric Code (NEC) guidelines require that outdoor cable be transitioned to indoor cable within 50 ft of the cable entry point. As more campus environments are moving to fiber-based WANs and LANs with collapsed backbones, the use of this specially constructed cable provides new options for more efficient use of fiber cables and simplified installation. The use of indoor/outdoor fiber cable can simplify fiber networks by eliminating transitions and splice points at building en trances. Use of specially constructed optical cabling provides new options for more efficient use of fiber and simplified installation.
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