Cisco Systems 7500 Series Manual De Usuario

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Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0
Chapter 2      Preparing for Installation
  Site Environment, Chassis Temperature, and Airflow Guidelines
Cisco 7505 Airflow Considerations
In the Cisco 7505, six individual axial fans draw cooling air through the chassis interior to maintain an 
acceptable temperature for the internal components. The fans draw air in through the inlet vents on the 
side of the chassis opposite the fans, across the processor modules and other internal components, and 
through the exhaust vents adjacent to the fans. 
The sides of the chassis must remain unobstructed to ensure adequate airflow and prevent overheating 
inside the chassis. A temperature sensor on the RSP monitors the internal air temperature. The power 
supply has two fans for cooling. 
 shows the chassis fans and airflow through the Cisco 7505. 
Figure 2-7
Airflow Through the Cisco 7505
Humidity, ambient (noncondensing) 
nonoperating and storage
5% 95% 
Altitude, operating and nonoperating
Sea level
10,000 ft (3050 m)
Vibration, operating 
5 to 200 Hz, 0.5 g
1
 (1 octave per 
minute)
Vibration, nonoperating 
5 to 200 Hz, 1 g (1 octave per minute)
200 to 500 Hz, 2 g (1 octave per minute) –
1.
g = force of gravity; 32 ft/sec
2
.
Table 2-1
Environmental Specifications for the Cisco 7500 Series Routers (continued)
Specifications
Minimum
Maximum
Power supply
airflow
H2000
Chassis
airflow
Interface processor end
Service (noninterface processor) end
Fan tray
Chassis
airflow
Power supply fans
Chassis fans
Top view of router
Power supply
airflow