Alcatel-Lucent Omni 6624 - Manual (Page 68)

Temperature Management OmniSwitch 6600 Series Chassis and Hardware Components
page 2-48 OmniSwitch 6600 Series Hardware Users Guide April 2004
Blank Cover Panels
Blank cover panels are provided with your switch and are used to cover empty uplink and stacking module
slots, as well as empty back up power supply bays (if applicable). These cover panels play an important
role in chassis airflow and temperature management. They also protect the switch’s processor board and
other sensitive internal switch components from physical damage by closing off a chassis that is not fully
populated.
If your switch is not fully populated with submodules and a redundant power supply, and blank cover
panels are not installed over empty slot locations, airflow is adversely affected.
When blank cover panels are missing, air does not take the direct route from the air intake vent, through
the chassis, and then out through the fan exhaust vents. Instead, a portion of the airflow is allowed to be
drawn in through the front and rear of the chassis. As a result, normal airflow is disrupted and an extra task
is placed on the fans to cool the chassis.
Cover panels also provide protection for module processor boards and other sensitive internal switch
components by closing off a chassis that is not fully populated.
Because they regulate airflow and help protect internal chassis components, blank cover panels should
remain installed over empty module slots and power supply bays at all times.
Effects of Missing Blank Panels on Chassis Airflow
Missing Cover Panels.
Missing cover panels affect
airflow by allowing air to be
drawn in through the front
submodule bays or rear
redundant power supply bay.
As a result, the direct route
from the air intake vent to the
fan exhaust vents is dis-
rupted.
For optimal airflow and
chassis component protec-
tion, always install blank
cover panels over empty
slots and power supply bays.
Air Intake Vent
Air leakage due to
missing submodule
cover panels
Air leakage due to
missing redundant
power supply panel