Chapter 5 Maintaining the Cisco Global Site Selector 4490
Maintaining Your Site Environment
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 and Radio Frequency Interference
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 interfere with cordless and
RFI is defined as any EMI with a frequency above 10 kHz. This type of interference can travel from the system to other devices through the power cable and power source or through the air like transmitted radio waves. The Federal Communications Commission (FCC) publishes specific regulations to limit the amount of EMI and RFI emitted by computing equipment. Each system meets these FCC regulations.
To reduce the possibility of EMI and RFI, follow these guidelines:
•Operate the system only with the system cover installed.
•Ensure that the screws on all peripheral cable connectors are securely fastened to their corresponding connectors on the back of the system.
•Always use shielded cables with metal connector shells for attaching peripherals to the system.
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