Plantronics T20 - Manual (Page 3)

11 Do not use telephone equipment to report a gas leak in the vicinity
of the leak.
12 Unplug this product from the wall outlet and refer servicing to
qualified service personnel under the following conditions:
a) When the power supply cord or plug is damaged or frayed.
b) If the product has been exposed to liquid.
c) If the product does not operate normally by following the
operating instructions. Adjust only those controls that are covered
by the operating instructions because improper adjustments of
other controls may result in damage and will often require
extensive work by a qualified technician to restore the product to
normal operation.
d) If the product has been dropped or the base unit has been
damaged.
e) If the product exhibits a distinct change in performance.
13 Never install telephone wiring during a lightning storm.
14 Never install telephone jacks in wet locations unless the jack is
specifically designed for wet locations.
15 Never touch uninsulated telephone wires or terminals unless the
telephone line has been disconnected at the network interface.
16 Use caution when installing or modifying telephone lines.
17 This product is intended to be supplied by a Listed Class 2 Direct
Plug-In Power Unit rated 9VDC 800mA. Plantronics Part No.
45669-01, rated at an input voltage of 120 VAC, 60Hz and an
output voltage of 9 VDC at 800mA.
18 This product requires AC power in order to operate. In order to
have phone service during a power outage, have another
telephone available that is powered only by the telephone line.
19 Keep all product cords and cables away from operating
machinery.