Cisco Systems CRS-1 manual Environmental Specifications

Chapter 3 Technical and Environmental Specifications

Environmental Specifications

Environmental Specifications

The following table lists the environmental specifications for the Cisco CRS-1 8-slot line card chassis.

Table 3-3 8-Slot Line Card Chassis Environmental Specifications

Description	Value
Temperature	Operating, nominal: 41° to 104°F (5° to 40°C)
	Operating, short-term: 23° to 122°F (–5° to 50°C)
	Nonoperating: –40° to 158°F (–40° to 70°C)
Humidity	Operating: 5 to 85% noncondensing
	Nonoperating: 5 to 90% noncondensing, short-term operation
Altitude	1 to 5906 ft (–60 to 1800 m) at 122°F (50°C), short-term
	Up to 13,123 ft (4000 m) at 104°F (40°C) or below
Heat dissipation	27,350 BTU per hour
External cooling	2.3 tons
requirements
Chassis airflow	Up to 900 cubic feet (25,485 liters) per minute
Power system airflow	Up to 240 cubic feet (6800 liters) per minute
Acoustic noise	76 dB—80°F (27°C) or lower (fan speed 4000 RPM)
3.3 ft (1 m) from chassis	86 dB—104°F (40°C) or higher (fan speed 6500 RPM)
	90 dB—failure condition (fan speed 7500 RPM)
Shock and vibration	Designed and tested to meet the NEBS shock and vibration standards
	defined in GR-63-CORE (Issue 2, April 2002).

Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide

3-6 OL-5802-06