> Environmental Specifications
> The sections in this chapter provide information related to environmental considerations and storage characteristics associated with the ASR 5000.
> Environmental Information
> Use the following information to plan your network installation for the ASR 5000 platform.
> Temperature, Humidity and Altitude Recommendations

> Temperature
> Operating | 0 degrees C to +55 degrees C
> Storage | -40 degrees C to +70 degrees C
> Humidity
> Operating | 20 to 80 percent non-condensing
> Storage | 10 to 95 percent non-condensing
> Altitude
> Operating | 197 ft. (60m) below to 13,123 ft. (4,000m) above sea level
> Non-operating | 197 ft. (60m) below to 49,212 ft. (15,000m) above sea level

> ‌
> Supported Environmental Standards
> The system has been successfully tested against the following environmental standards:

> • | Operational Thermal, Operating Conditions - GR-63 Criteria [72, 73]

> • | 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) [8.2 meters per minute].
> 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.
> System Airflow and Ventilation
> Caution: When planning chassis installation, ensure that equipment rack or cabinet hardware does not hinder air flow at any of the intake or exhaust vents. Additionally, ensure that the rack/cabinet hardware, as well as the ambient environment, allow the system to function within the operating limits specified in this chapter.

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