MX960 Cabinet Size and Clearance Requirements
The minimum size cabinet that can accommodate the router is 600 mm wide and 800 mm deep. A cabinet larger than the minimum requirement provides better airflow and reduces the chance of overheating. To accommodate a single router, the cabinet must be at least 16 U high. If you provide adequate cooling air and airflow clearance in a cabinet that has at least 48 U (89.3 in. or 224 mm) of usable vertical space, you can stack three routers with the standard cable manger installed, or two routers with the extended cable manager installed.
The minimum front and rear clearance requirements depend on the mounting configuration you choose. The minimum total clearance inside the cabinet is 39.4 in or 1000 mm. between the inside of the front door and the inside of the rear door.