3Com Router 3000 ADSL2+ Family
Installation Guide
2. Installing the Router
2-1
Chapter 2 Installing the Router
2.1 Safety Precautions
Caution:
Observe the safety precautions in this section when installing or maintaining your router to avoid bodily injuries or device
impairment caused by improper actions.
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Maintain an indoor temperature in the range 0 to 45 C (32 to 113 F) and a humidity level
in the range 10 to 90%.
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Keep the router away from radio transmitting stations, radar stations, and high-frequency
devices. Use electromagnetic shielding if necessary.
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Do not put the router on an unstable table or platform.
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Make sure that the rack/workbench has a good ventilation system and is properly
grounded.
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Wear an ESD-preventive wrist strap during installation, making sure that it has good
skin-contact.
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Reserve adequate clearance at the air intake and exhaust vents for ventilation.
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For power supply, use a single-phase three-line power socket with a neutral point or use
a universal PC power socket, making sure that the neutral point is well connected to
building ground.
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Make sure the correct voltage is used.
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Put a lightning arrester at the front end of the power input to enhance its lightning
protection. To this end, put a special lightning arrester at the front end of signal cables
that are led outdoors, such as ISDN, telephone, and T1 cables.
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Do not open the chassis when the router is operating or when electricity hazards are
present to avoid electrical shocks. Before you open the chassis, obtain the permission of
your sales agent.
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Correctly connect the interface cables. Do not connect a telephone cable (including the
ISDN cable) to a serial port.
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Do not hot swap any cable.
