Bridge/Router Installation Guide

A-3
Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide
OL-10971-07
Appendix A Cisco CRS-1 4-Slot Line Card Chassis System Specifications
Environmental Specifications
Environmental Specifications
Table A-2 lists the environmental specifications for the Cisco CRS-1 4-slot line card chassis.
1. Protective earthing conductor (ground wire).
Ta b l e A-2 Cisco CRS-1 4-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)
1
Nonoperating: –40° to 158°F (–40° to 70°C)
Humidity Operating: 5% to 85% noncondensing
Nonoperating: 5% to 90% noncondensing, short-term operation
Altitude –197 to 5906 ft (–60 to 1800 m) at 122°F (50°C), short-term
Up to 10,000 ft (3048 m) at 104°F (40°C) or below
Heat dissipation • AC: 14,280 BTU per hour (maximum)
• DC: 14,597 BTU per hour (maximum)
Power density 12,406 W per sq. meter (maximum)
Average air exhaust
temperature
129°F (54°C)—At room temperatures of 95 to 102°F (35 to 39°C)
149°F (65°C)—Maximum exhaust temperature on a fully loaded system
during worst-case operating conditions (50°C and 6000 ft altitude)
Acoustic noise Fans at normal to moderate speed:
67 dBa—front of chassis
77 dBa—rear of chassis
Fans at maximum speed (7500 RPM):
83 dBa—front of chassis
93 dBa—rear of chassis
Shock and vibration Designed and tested to meet the NEBS shock and vibration standards defined
in GR-63-CORE (Issue 2, April 2002).
1. “Short-term” refers to a period of not more than 96 consecutive hours and a total of not more than 15 days in one year. This
refers to a total of 360 hours in any given year, but no more than 15 occurrences during that one-year period.