Polycom QSX Administrator's Manual page 51

Underwriters Laboratories Statement
The system is intended to be powered only by the supplied power supply unit.
Special Safety Instructions
Follow existing safety instructions and observe all safeguards as directed.
Installation Instructions
Installation must be performed in accordance with all relevant national wiring rules.
Plug Acts as Disconnect Device
The socket outlet to which this apparatus is connected must be installed near the
equipment and must always be readily accessible.
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