AT&T 75 Wiring Manual page 265

Figure 3-30. Mounting 900-Pair 110P-Type Terminal Blocks (Approximately
432 4-Pair or 576 3-Pair Station Capacity Illustrated)
Frame Mounting 110P-Type Terminal Blocks
The 900-pair 110P-type terminal blocks can also be frame mounted instead of wall mounted.
The 1110A2 apparatus mounting frame is used to frame mount the 900-pair 110P-type
terminal blocks and the 188C vertical patch cord troughs. Each 1110A2 frame allows for
mounting of five units on each side of the frame. The units can be any mixture of 900-pair
110P-type terminal blocks and 188C vertical patch cord troughs. The 1110A2 apparatus
mounting frame is 76-1/2 inches (194.3 cm) high, 43-1/2 inches (110.5 cm) wide, and 16 inches
(40.64 cm) deep.
110-TYPE HARDWARE
3-49