Compaq 2000 - Manual (Page 9)

About This Guide ix
Any RJ-45 receptacle marked with these symbols indicates a Network
Interface Connection.
WARNING: To reduce the risk of electrical shock, fire, or damage to
the equipment, do not plug telephone or telecommunications
connectors into this receptacle.
Any surface or area of the equipment marked with these symbols
indicates the presence of a hot surface or hot component. If this
surface is contacted, the potential for injury exists.
WARNING: To reduce the risk of injury from a hot component, allow
the surface to cool before touching.
Precautions
WARNING: There is a risk of electric shock from high earth conductor leakage
current when connecting multiple pieces of Information Technology Equipment
to Compaq 2000 Series Uninterruptible Power Systems (UPS):
The summation of the input power for multiple pieces of Information Technology
Equipment through the use of a UPS can result in high earth conductor leakage
current. For UPS products that have detachable AC power cords, the total
combined earth conductor leakage current should not exceed 3.5 mA.
WARNING: There is a risk of personal injury from the hazardous energy levels
associated with UPS batteries. The maintenance and replacement of batteries
must be carried out by qualified service personnel.