Appendix A Cisco CRS-1 4-Slot Line Card Chassis System Specifications
Environmental Specifications
1. Protective earthing conductor (ground wire).
Environmental Specifications
Table A-2lists the environmental specifications for the Cisco CRS-1 4-slot line card chassis.
Table 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 | 129°F (54°C)—At room temperatures of 95 to 102°F (35 to 39°C) |
temperature | 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.
Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide
