Allied Telesis AlliedWare Plus x950 Series Installation Manual page 81

Note
If installed in a closed or multi-unit rack assembly, the operating
ambient temperature of the rack environment may be greater than
the room ambient temperature. Therefore, consideration should be
given to installing the equipment in an environment compatible with
the manufacturer's maximum rated ambient temperature (Tmra). 
E35
Caution
Installation of the equipment in a rack should be such that the
amount of air flow required for safe operation of the equipment is not
compromised.  E36
Warning
Reliable earthing of rack-mounted equipment should be maintained.
Particular attention should be given to supply connections other than
direct connections to the branch circuits (e.g., use of power strips).
 E37
Warning
This product may have multiple AC power cords installed. To de-
energize this equipment, disconnect all power cords from the device.
 E41
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
Caution
The unit does not contain serviceable components. Please return
damaged units for servicing.  E42
x950 Series Installation Guide for VCStack
81