AT&T 75 Wiring Manual page 460

66-TYPE HARDWARE
The connectorized 66-type connecting blocks are factory wired for cable routing from the top
so that the cable connector will align with the jack on the connecting block. If cable routing
from the bottom is desired, then the jack on the connecting block can be removed from the
connecting block by removing two screws and rotated 180 degrees. The jack must be
relocated in the hole that was previously unoccupied because the wires that connect to the
connecting block will be not be long enough to reach the hole that the connector was
removed from. The velcro cable retainer must also be relocated along with the jack.
To install the cross-connect field, proceed as follows:
1 .
Draw a level horizontal line on the mounting wall 12 inches (30.5 cm) above the
floor (Figure 4-18).
2 .
Position the first backboard or connecting block so that the bottom is located on
the line and mark the mounting holes.
3 . Remove the backboard or connecting block and drill holes in the wall for a 3/4-inch
(1.9 cm) No. 12 wood screw.
Move the backboard or connecting block back into place and fasten to the wall
4 .
using 3/4-inch (1.9 cm) No. 12 wood screws.
The next backboard or connecting block can be mounted to the left or above the
5 .
one just installed, depending on space requirements. Repeat steps 2, 3 and 4 until
each backboard or connecting block has been installed.
Note: The 66-type connecting blocks should not be installed so that the height above
the floor exceeds 3 183-type backboards plus a 187B1 backboard, approximately 78-1/2
inches (200 cm).
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