Allied Telesis AT-IE300-12GP Installation Manual page 54

Chapter 2: Beginning the Installation
54
Warning
To reduce the risk of electric shock, do not route network cables
from PoE ports outside the building that houses this device.  E40
Caution
The unit does not contain serviceable components. Please return
damaged units for servicing.  E42
Warning
The temperature of an operational SFP or SFP+ transceiver can
exceed 70° C (158° F). Exercise caution when handling transceivers
with unprotected hands.  E43
Caution
An Energy Hazard exists inside this equipment. Do not insert hands
or tools into open chassis slots or plugs.  E44
Warning
This equipment shall be installed in a Restricted Access location. 
E45
Warning
An operational unit can be hot. Exercise caution when handling with
unprotected hands.
Warning
Per NEC section 800.90 all exposed cables, service wires, or drops
entering a building must have primary over-voltage protection if they
are classified as exposed plants.
Note
The equipment meets EN61000-4-5 Class 3 on the DC inputs and
Ethernet ports.