Cisco ASR 9000 Series Quick Reference Manual page 7

Cisco ASR 9000 Series
Line Card
Grounding
Corrosion
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Grounding
Ensure that all equipment racks are grounded to the building. Otherwise, it can pose a serious safety risk to personnel.
Additionally, an electrical current can cause operational deficiencies or expose the networking equipment to the risk of permanent
failure due to ESD risks.
Verify the effectiveness of a good ground connection using a multimeter. The multimeter readings should display less than 1 Ohm
for good point-to-point resistivity.
For more details on grounding, click here.
Corrosion
Over a period of time, corrosion can degrade the performance of the components. It leads to blocked currents, brittle connection
points, and overheated electrical systems. As chemical reactions continue, the corrosion by-products form insulating layers on
circuits, and they usually cause electronic failure, short circuits, pitting, and metal loss. Therefore, ensure that the maximum
concentration of contaminants for indoor installation does not exceed the prescribed limit.
Avoid touching contacts on modules and protect the equipment from extreme temperatures and moist, salty environments. Monitor
the environmental factors that impact the corrosion rate: ambient pressure, humidity, and temperature. Whenever possible, ensure
that the installation site is fully air conditioned to ensure that the environmental factors are under control.
Install real-time corrosion measurement systems. Corrosion monitors enable you to take preventive action before serious
damage occurs.
The use of HEPA filters is advised to maintain clean air circulation systems.
Avoid using direct air cooling on the product (network equipment).
Maintenance Best Practices
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