Chassis Air Flow - Cisco ASR 5000 series Product Overview

Environmental Specifications
Airborne Contaminants, Indoor Levels - GR-63 Criterion [125]
Operational Thermal, Short-term Conditions - GR-63 Criteria [72, 73]
Storage Environments, and Transportation and Handling - GR-63 Criteria [69-71, 107-109, 124]
Earthquake Zone 4 - GR-63 Criteria [110-112, 114, 115, 117, 119]
Airborne Contaminants, Outdoor Levels - GR-63 Criteria [126, 127]
Altitude - GR-63 Criteria [74, 76]
Thermal Heat Dissipation - GR-63 Criteria [77-79]
Acoustic Noise - GR-63 Criterion [128]
ESTI 300 019 - Environmental conditions and environmental tests for telecommunications equipment

Chassis Air Flow

Airflow within the ASR 5000 is designed per Telcordia recommendations to ensure the proper vertical convection
cooling of the system.
As shown in figure below, the lower fan tray pulls fresh air in from the front and side intake vents located near the
bottom of the chassis. As the air is forced upwards through the system, it cools installed components as it passes over
them.The airflow through the chassis, as measured by the speed of the airflow across the various card slots, maintains an
average of 290 feet per minute (fpm).
The upper fan tray pulls heated air up through the chassis, forces it through the side and rear exhaust vents located near
the top of the chassis, and expels the air from the system.
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Environmental Information ▀
Cisco ASR 5000 Series Product Overview ▄