AT&T 75 - Page 252

110-TYPE HARDWARE
CAPACITY WHITE FIELD = 192 3-PAIR CIRCUITS
CAPACITY BLUE FIELD = 144 4-PAIR CIRCUITS
OR 192 3-PAIR CIRCUITS
CAPACITY PURPLE FIELD = 192 3-PAIR CIRCUITS
Figure 3-21. Distribution Field Arrangement—Four 300-Pair Terminal Blocks
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