Removal and replacement procedures  24 
   
This symbol on an RJ-45 receptacle indicates a network interface connection. 
WARNING: To reduce the risk of electric shock, fire, or damage to the equipment, 
do not plug telephone or telecommunications connectors into this receptacle. 
 
 
   
This symbol 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. 
 
 
   
49 - 109 kg 
100 - 240 lb 
This symbol indicates that the component exceeds the recommended weight for one 
individual to handle safely. 
WARNING: To reduce the risk of personal injury or damage to the equipment, 
observe local occupational health and safety requirements and guidelines for 
manual material handling. 
 
 
 
These symbols, on power supplies or systems, indicate that the equipment is 
supplied by multiple sources of power. 
WARNING:  To reduce the risk of injury from electric shock, remove all power 
cords to completely disconnect power from the system. 
 
 
Rack warnings 
 
 
WARNING: To reduce the risk of personal injury or damage to the equipment, be sure that: 
•  The leveling jacks are extended to the floor. 
•  The full weight of the rack rests on the leveling jacks. 
•  The stabilizing feet are attached to the rack if it is a single-rack installation.  
•  The racks are coupled together in multiple-rack installations.  
•  Only one component is extended at a time. A rack may become unstable if more than one 
component is extended for any reason.  
 
 
 
WARNING: To reduce the risk of personal injury or equipment damage when unloading a 
rack: 
•  At least two people are needed to safely unload the rack from the pallet. An empty 42U 
rack can weigh as much as 115 kg (253 lb), can stand more than 2.1 m (7 ft) tall, and 
may become unstable when being moved on its casters. 
•  Never stand in front of the rack when it is rolling down the ramp from the pallet. Always 
handle the rack from both sides. 
 
 
 
WARNING: To reduce the risk of personal injury or damage to the equipment, adequately 
stabilize the rack before extending a component outside the rack. Extend only one component 
at a time. A rack may become unstable if more than one component is extended. 
 
 
 
WARNING: When installing a server in a telco rack, be sure that the rack frame is 
adequately secured at the top and bottom to the building structure.