Nortel Meridian 1 Option 11C Planning And Installation Manual page 117

Figure 40
Brackets for horizontal expansion
4 Perform this step only if an expansion cabinet is to be located
immediately next to the main cabinet (or an existing expansion
cabinet). Otherwise, go to the next step (Step 5 on page 118).
Fasten an alignment bracket (shipped with the cabinet) to the wall
as shown in Figure 40 on page 117.
The alignment bracket determines the minimum distance between the
main and expansion cabinets if mounted side-by-side. It is not required
if the space between cabinets is significant.
Alignment bracket
Mounting the cabinets Page 117 of 408
Option 11C Planning and Installation Guide