AT&T System 75, Wiring Diagram

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Hardware Equipment Room Applications
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110AC1-300STF/6 which has six stub cables that exit from the
top of the terminal block. Each cable stub is 6-feet long and
equipped with a 50-pin female connector.
110PC1-300CT which has six stub cables that exit from the top of
the terminal block. Each cable stub is 6-feet long and equipped
with a 50-pin female connector.
Figure 3-2 shows two typical 900-pair terminal block configurations of
110-type hardware arranged for use in the trunk/auxiliary field. One
900-pair terminal block will terminate 288 three-pair circuits and two
900-pair terminal blocks will terminate 576 three-pair circuits.
188C2
BACKBOARD
GREEN
PURPLE
FILL
FILL
PURPLE
FILL
YELLOW
FILL
YELLOW
FILL
CAPACITY = 288 3-PAIR CIRCUITS
GREEN
FILL
YELLOW
FILL
CAPACITY = 576 3-PAIR CIRCUITS
Figure 3-2. 900-Pair Trunk/Auxiliary Field Arrangements
The 900-pair 110P-type terminal block recommended for the
trunk/auxiliary field is the:
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110PC1-900CB which is equipped with 36 female 50-pin
connectors. The connectors are mounted at the bottom of the
terminal block. This allows for easy cable routing to the floor
and/or the cable slack manager as required.
3-3