Allied Telesis AT-GS950/8 - Manual (Page 48)

Chapter 3: Troubleshooting
48
Checking the LEDs
This section describes how to troubleshoot the AT-GS950/8 switch using
the POWER and L/A LEDs.
Checking the
POWER LED
Check the POWER LED on the front of the switch. If the LED is off,
indicating that the unit is not receiving power, do the following:
ˆ Ensure that the power cord is securely connected to the power source
and to the AC connector on the back panel of the switch.
ˆ Verify that the power outlet has power by connecting another
device to it.
ˆ Connect the unit to another power source.
ˆ Replace the power cord.
ˆ Verify that the voltage from the power source is within the required
levels for your region.
Checking the L/A
LED
Verify that the L/A LED for each port is ON. If a L/A LED is OFF, do the
following:
ˆ Verify that the end node connected to the port is powered on and is
operating properly.
ˆ Verify that the twisted pair cable is securely connected to the port on
the switch and to the port on the end node.
ˆ Ensure that the twisted pair cable does not exceed 100 meters (328
feet).
ˆ Verify that you are using the appropriate category of twisted pair cable:
Category 3 or better for 10 Mbps operation and Category 5 and
Category 5E for 100 and 1000 Mbps operation.
Note
A 1000Base connection may require five to ten seconds to establish
a link.