Cisco Unified 500 Series Getting Started page 35

Warning For connections outside the building where the equipment is installed, the
following ports must be connected through an approved network termination
unit with integral circuit protection: 10/100/1000 Ethernet. Statement 1044
Warning When installing or replacing the unit, the ground connection must always be
made first and disconnected last. Statement 1046
Warning Voltages that present a shock hazard may exist on Power over Ethernet (PoE)
circuits if interconnections are made using uninsulated exposed metal
contacts, conductors, or terminals. Avoid using such interconnection
methods, unless the exposed metal parts are located within a restricted
access location and users and service people who are authorized within the
restricted access location are made aware of the hazard. A restricted access
area can be accessed only through the use of a special tool, lock and key or
other means of security. Statement 1072
Warning No user-serviceable parts inside. Do not open. Statement 1073
Warning Installation of the equipment must comply with local and national electrical
codes. Statement 1074
35