Juniper ACX4000 Hardware Manual page 88

Table 24: Cabinet Requirements and Specifications for the ACX4000 Router
Cabinet Requirement
Cabinet clearance
Cabinet airflow requirements
(Continued)
Guidelines
•
The outer edges of the mounting brackets extend
the width of the chassis to 19 in. (48.3 cm).
•
The minimum total clearance inside the cabinet is
30 in. (76.2 cm) between the inside of the front
door and the inside of the rear door.
When you mount the router in a cabinet, ensure that
ventilation through the cabinet is sufficient to prevent
overheating.
•
Ensure an adequate cool air supply to dissipate the
thermal output of the router or routers.
•
Ensure that the cabinet allows the chassis hot
exhaust air to exit the cabinet without recirculating
into the router. An open cabinet (without a top or
doors) that employs hot air exhaust extraction
from the top allows the best airflow through the
chassis. If the cabinet contains a top or doors,
perforations in these elements assist with
removing the hot air exhaust.
•
Install the router in the cabinet in a way that
maximizes the open space on the side of the
chassis that has the hot air exhaust. This space
maximizes the clearance for critical airflow.
•
Route and dress all cables to minimize the
blockage of airflow to and from the chassis.
•
Ensure that the spacing of rails and adjacent
cabinets allows for the proper clearance around
the router and cabinet.
•
A cabinet larger than the minimum required
provides better airflow and reduces the chance of
overheating.
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