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....