3com 3CDSG8 Guía Del Usuario
20
Instaling
the
Switch
Mounting Instructions for Cement Walls
1.
Make two holes 150 mm (5.9 in.) apart and insert two nylon or similar screw anchors that
are suitable for the wall construction.
2.
Fix two suitable screws into the anchors, leaving their heads 3 mm (0.12 in.) clear of the
wall surface. The screws should be at least 30 mm (1.2 in.) long,
3.
Remove any connections in the Switch and locate it over the screw heads. When in line,
gently push the Switch on to the wall and move it downwards to secure.
Mounting Instructions for Wood Walls
1.
Make two holes 150 mm (5.9 in.) apart.
2.
Fix two suitable screws directly into the wall, leaving their heads 3 mm (0.12 in.) clear of the
wall surface. The screws should be at least 20 mm (0.75 in.) long,
3.
Remove any connections in the Switch and locate it over the screw heads. When in line,
gently push the Switch on to the wall and move it downwards to secure.
CAUTION: When making connections, be careful not to push the Switch up
and off the wall.
and off the wall.
________________________________________________________________
Supplying Power to the Switch
Power problems can be the cause of serious failures and downtime in your network. Ensure that
the power input to your system is clean and free from sags and surges to avoid unforeseen
network outages. 3Com recommends that you install power conditioning, especially in areas
prone to blackout, power dips and electrical storms.
Before powering on the Switch, verify that the network cables and the power
cable are securely connected.
cable are securely connected.
CAUTION: The Switch has no ON/OFF switch. The only way to power on and
power off the Switch is by connecting and disconnecting the power cord. This is
called “power cycling”.
power off the Switch is by connecting and disconnecting the power cord. This is
called “power cycling”.
To power on the Switch:
1.
Plug the DC power cord from the power adapter into the power socket on the rear panel of
the Switch.
2.
Plug the power adapter into a power outlet.
When the Switch is powered on, the Power LED lights up. If the Power LED does not light up,
check the power supply connections including another mains outlet if appropriate. If the Power
LED is still not lit it is likely that the power adapter is faulty. Refer to the Troubleshooting
Appendix of this User Guide.
Checking for Correct Operation
After you power on the Switch, it automatically performs a power-on self-test (POST). During
POST, the Status LED on the front panel of the Switch flashes green.