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WARNING
For units with an external power adapter, the adapter shall be a
listed Limited Power Source.
WARNING
Hazardous network voltages are present in WAN ports regard-
less of whether power to the SmartNode is ON or OFF. To avoid
e
lectric shock, use caution when near WAN ports. When
detaching the cables, detach the end away from the Smart-
Node first.
WARNING
Before opening the chassis, disconnect the telephone network
cables to avoid contact with telephone line voltages. When
detaching the cables, detach the end away from the Smart-
Node first.
WARNING
Do not work on the system or connect or disconnect cables
during periods of lightning activity.
In accordance with the requirements of council directive 2002/96/
EC on Waste of Electrical and Electronic Equipment (WEEE),
ensure that at end-of-life you separate this product from other
waste and scrap and deliver to the WEEE collection system in
your country for recycling.
8
SmartNode 4520 & 4110 Series User Manual About this guide
Preventing electrostatic discharge damage
When starting to install interface cards place the interface car
d on its shielded plastic bag if you lay it on your bench.
CAUTION
Electrostatic Discharge (ESD) can damage equipment and
impair electrical circuitry. It occurs when electronic printed circuit
cards are improperly handled and can result in complete or inter-
mittent failures. Do the following to prevent ESD:
• Always follow ESD prevention procedures when removing and
replacing cards.
• Wear an ESD-preventive wrist strap, ensuring that it makes good
skin contact. Connect the clip to an unpainted surface of the chas-
sis frame to safely channel unwanted ESD voltages to ground.
• To properly guard against ESD damage and shocks, the wrist strap
and cord must operate effectively. If no wrist strap is available,
ground yourself by touching the metal part of the chassis.