AT&T System 75 Wiring Diagram page 109

CHAPTER 3. EQUIPMENT ROOM DESIGN
80-1/2 INCHES
7-11/16 INCHES
Figure 3-14. Mounting 300-Pair 110P-Type Terminal Blocks
(Approximately 288 4-Pair or 384 3-Pair Station
Capacity Illustrated)
To mount the first trunk/auxiliary field terminal block, partially install
2.
two 3/4-inch No. 12 wood screws, 7-11/16 inches apart on the left
side of the horizontal line on the wall
3. Slide the bottom terminal block feet onto the mounting screws and
mark the upper mounting screw locations.
4. Remove the terminal block and partially install the upper mounting
screws.
5. Place the terminal block on the mounting screws and tighten the
screws.
If a vertical patch cord trough is to be installed, partially install the
6.
first screw for the patch cord trough, on the line, 7/8 inch to the right
3-26
48 INCHES
5-5/16 INCHES
7/8 INCH
AC POWER
STRIP
HORIZONTAL
LINE
47-1/2 INCHES
FLOOR LINE