Cisco Systems 7500 Series Manual De Usuario

The system displays warning messages on the console if chassis interface-monitored parameters exceed 
a desired threshold or if a blower failure occurs. You can also retrieve and display environmental status 
reports with the show environment, show environment all, show environment last, and show 
environment table commands. Parameters are measured and reporting functions are updated every 60 
seconds. 

All temperature ranges and values described in this section are subject to change.

To prevent overheating the chassis, ensure that your system is drawing cool inlet air. Overtemperature 
conditions can occur if the system is drawing in the exhaust air of other equipment. Ensure adequate 
clearance around the sides of the chassis so that cooling air can flow through the chassis interior 
unimpeded. Obstructing or blocking the air vents will restrict the airflow and can cause the internal 
chassis temperature to exceed acceptable limits.

The following sections include the environmental reporting and fan or blower functions for the Cisco 
7500 series routers:

Inlet 10–40°C

44°C

50°C

–

Hotpoint

10–40°C

54°C

60°C

–

Exhaust 10–40°C

–

–

–

Processors

–

–

–

70°C

Power supply

–

–

–

75°C 

1

1.

Processor-monitored power supply shutdown is not supported on the Cisco 7576.

Restart

40°C

–

–

–

+5VDC

4.74 to 5.26

4.49

4.74

5.25

5.52

+12VDC

10.20 to 13.8

10.76

11.37

12.64

13.24

–12VDC

–10.20 to  –13.80 –10.15

–10.76

–13.25

–13.86

+24VDC

20.00 to 28.00

19.06

21.51

26.51

28.87