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Cisco Global Site Selector 4491 Hardware Installation Guide
78-16356-01
Chapter 5 Maintaining Your GSS
Maintaining Your Site Environment
To reduce the effects of ESD, 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) can
adversely affect devices such as radio and television (TV) receivers operating near
the GSS. Radio frequencies emanating from the GSS can also interfere with
cordless and low-power telephones. Conversely, RFI from high-power telephones
can cause spurious characters to appear on a monitor screen.
RFI is defined as any EMI with a frequency above 10 kHz. This type of
interference can travel from the GSS 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 GSS meets these
FCC regulations.
To reduce the possibility of EMI and RFI, follow these guidelines:
• Operate the GSS only with its cover installed.
• Ensure that the screws on all peripheral cable connectors are securely
fastened to their corresponding connectors on the back of the GSS.
• Always use shielded cables with metal connector shells for attaching
peripherals to the GSS.