Removal and replacement procedures 25
This symbol on an RJ-45 receptacle indicates a network interface connection.
WARNING: To reduce the ris
k 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.
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 might
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.
Preparation procedures
To access some components and perform certain service procedures, you must perform one or more of the
following procedures:
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