Nortel Meridian 1 Succession 1000M Installation And Configuration Manual page 135

Procedure 9
Installing the chassis on a wall in a vertical position
1 Draw the vertical center line of the chassis on the plywood backboard.
Allow for clearance on the left and right of the chassis for cables and card
access. Refer to Figure 44 on
2 Draw a horizontal line on the plywood backboard.
This line indicates the vertical position of the lower hole of the wall
bracket.
Place the wall bracket against the plywood backboard. Place the lower
mounting hole over the intersection of the vertical and horizontal lines.
Fasten the wall bracket securely to the plywood backboard with three #12
wood screws provided (or other appropriate fasteners). See Figure 45.
Note: Make sure that the hook feature on the wall bracket points toward
the top of the backboard.
Figure 45
Wall bracket fastened to backboard
Hook
feature
Wall
bracket
Mounting the chassis
page 134.
Lower
mounting
hole
Small System Installation and Configuration
Page 135 of 562