Preventing Electrostatic Discharge Damage - Cisco SOHO 71 Installation Manual

Chapter 2 Installation
Warning
Warning

Preventing Electrostatic Discharge Damage

Step 1
Caution
Step 2
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To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits
to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits,
and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45
connectors. Use caution when connecting cables.
Do not work on the system or connect or disconnect cables during periods of
lightning activity.
Electrostatic discharge (ESD) is a transfer of electrostatic charge between bodies
of different electrostatic potentials, such as an operator and a piece of electrical
equipment. It occurs when electronic components are improperly handled, and it
can damage equipment and impair electrical circuitry. Electrostatic discharge is
more likely to occur in the presence of synthetic fibers and dry atmosphere.
Always use the following ESD-prevention procedures when removing and
replacing components:
Wear an ESD-preventive wrist strap that you provide, ensuring that it makes good
skin contact.
To properly guard against ESD damage and shocks, the wrist strap and cord must
operate effectively. Always follow the guidelines in the preceding section,
"Warnings."
Do not touch any exposed contact pins or connector shells of interface ports that
do not have a cable attached.
If cables are connected at one end only, do not touch the exposed pins at the
unconnected end of the cable.
This device is intended for use in residential and commercial environments only.
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