Cisco Systems 7326 Manual De Usuario

The oil from a person’s fingers or prolonged exposure to high temperature or 
humidity can corrode the gold-plated edge connectors and pin connectors on 
various devices in the system. This corrosion on system connectors is a gradual 
process that can eventually lead to intermittent failures of electrical circuits.

To prevent corrosion, you should avoid touching contacts on boards and cards. 
Protecting the system from corrosive elements is especially important in moist 
and salty environments, which tend to promote corrosion. Also, as a further 
deterrent to corrosion, the system should not be used in extreme temperatures, as 
explained in the 

Electrostatic discharge (ESD) results from the buildup of static electricity on the 
human body and certain other objects. This static electricity is often produced by 
simple movements such as walking across a carpet. ESD is a discharge of a static 
electrical charge that occurs when a person whose body contains such a charge 
touches a component in the system. This static discharge can cause components, 
especially chips, to fail. ESD is a problem particularly in dry environments where 
the relative humidity is below 50 percent.

To reduce the effects of ESD, you should observe the following guidelines:

Wear a grounding wrist strap. If a grounding wrist strap is unavailable, touch 
an unpainted metal surface on the chassis periodically to neutralize any static 
charge. 

Keep components in their antistatic packaging until they are installed.

Avoid wearing clothing made of wool or synthetic materials.

Electromagnetic interference (EMI) and radio frequency interference (RFI) from 
a system can adversely affect devices such as radio and television (TV) receivers 
operating near the system. Radio frequencies emanating from a system can also