Dramatic Attenuation in Fiber Access Terminals at Low Temperatures

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Dramatic Attenuation in Fiber Access Terminals at Low Temperatures

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It is common in applications where access terminals are used to terminate only a portion of the fibers brought into the enclosure–allowing the remainder of the fibers to pass through. When loose tube cable is used, the sub-units that are not terminated are "expressed" through, and the sub-unit material is not opened at any point. To provide customers with adequate sub-unit length for splicing under all conditions, ADC specifies a mid-span access length of 150" to 170". Testing of the enclosure with expressed sub-units of this length alerted ADC to potential low temperature issues....

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