Grounding; Servicing; Power Adapter; Magnetic Earpiece - HP 4120 Quick Start Manual

Grounding

If your LAN covers an area served by more than one power
distribution system, be sure the associated safety grounds are
securely interconnected.
Caution: LAN cables may occasionally be subject to hazardous
transient voltages (such as lightning or disturbances in the electrical
utilities power grid). Handle exposed metal components of the
network with caution.

Servicing

No user-serviceable parts are inside this product. Any servicing,
adjustment, maintenance, or repair must be performed by service-
trained personnel only.

Power Adapter

If the phone is not supplied with power via an Ethernet cable, use
only the power adapter expressly recommended by Hewlett-Packard
(HP 5V external power supply, J9767A). A 48V supply, as used by other
IP phone vendors, will permanently damage this phone.

Magnetic Earpiece

Caution: The earpiece of the HP 4120 has a strong magnetic field that
can attract ferromagnetic objects, such as pins, paperclips, staples,
thumbtacks, and other metallic items. Be careful when the earpiece
is near these objects. Sharp objects that adhere to the magnets
in the earpiece may result in cuts or injury to the ear, face, and/or
hands.

Miscellaneous

■
Avoid placing the cables where people may trip over them or
where they may be exposed to mechanical pressure, as this
may damage them.
■
Caution: This device is for indoor use only! NOT FOR
OUTDOOR USE!
HP 4120 Quick Start Guide
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