18
Troubleshooting
This section explains how to isolate and diagnose problems with the switch. If
you have a problem not listed in this section and you cannot solve it, contact
Allied Telesyn Technical Support.
All LEDs are OFF.
G
Make sure you are not using a telephone cable (RJ-11) to connect
devices to the switch.
G
The power cord must be firmly connected to the power supply. If the
connection is secure and the switch is not receiving power, replace the
power cord.
G
Make sure the switch is placed where there is adequate airflow on
both sides of the switch and the operating temperature does not
exceed 40
o
C. Do not place the switch in direct sunlight or near warm
air exhausts or heaters.
A port is not transmitting or receiving.
G
Make sure the cables are securely connected at both ends of the link.
G
The port’s status must be configured to “Enable” and the auto-
negotiation feature is enabled for the switch. Refer to the user’s guide
for details on port configuration.
The terminal cannot access the switch software.
G
Make sure your terminal is configured appropriately and the baud
settings are correct. Refer to “Setting Up for Local Management” on
page 17 for details.
G
You are using the proper null modem cable.
The Web browser cannot access the switch.
G
Make sure the switch’s IP configurations are correct. Refer to the
AT-S30 User’s Guide for details on IP configuration.
G
The switch is powered ON.