AT&T 75 - Page 254

110-TYPE HARDWARE
CAPACITY WHITE FIELD = 576 3-PAIR CIRCUITS
CAPACITY BLUE FIELD = 432 4-PAIR CIRCUITS OR
576 3-PAIR CIRCUITS
CAPACITY PURPLE FIELD = 576 3-PAIR CIRCUITS
Figure 3-23. Distribution Field Arrangement—Four 900-Pair Terminal Blocks
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