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1.8 SAFETY WHEN WORKING WITH ELECTRICITY
• Do not open the device when the power cord is con-
nected. For systems without a power switch and
without an external power adapter, line voltages
are present within the device when the power cord
is connected.
• For devices with an external power adapter, the
power adapter shall be a listed Limited Power
Source The mains outlet that is utilized to power
the device shall be within 10 feet (3 meters) of the
device, shall be easily accessible, and protected
by a circuit breaker in compliance with local regu-
latory requirements.
• For AC powered devices, ensure that the power
cable used meets all applicable standards for the
country in which it is to be installed.
• For AC powered devices which have 3 conductor
power plugs (L1, L2 & GND or Hot, Neutral &
Safety/Protective Ground), the wall outlet (or
socket) must have an earth ground.
• For DC powered devices, ensure that the intercon-
necting cables are rated for proper voltage, cur-
rent, anticipated temperature, flammability, and
mechanical serviceability.
• WAN, LAN & PSTN ports (connections) may have
hazardous voltages present regardless of whether
the device is powered ON or OFF. PSTN relates to
interfaces such as telephone lines, FXS, FXO, DSL,
xDSL, T1, E1, ISDN, Voice, etc. These are known
as “hazardous network voltages” and to avoid
electric shock use caution when working near these
ports. When disconnecting cables for these ports,
detach the far end connection first.
• Do not work on the device or connect or disconnect
cables during periods of lightning activity.
WARNING