Allied Telesis AT-8012M Installation Manual page 78

Troubleshooting
78
If the FAULT LED remains ON, try downloading a new version of
the switch's management software through the RS-232 Terminal
Port on the front panel of the switch. For instructions, refer to the
switch's software management guide.
Note
If the FAULT LED remains steady ON, contact Allied Telesyn
Technical Support for assistance.
If you are unable to establish a local management session with the
switch through the RS-232 Terminal Port on the front panel, do the
following:
Check to be sure that the RS-232 cable is securely connected to
the RS-232 Terminal Port on the switch and to the RS-232 port on
the terminal or personal computer.
Check to be sure that you are using a straight-through RS-232
cable. Do not use a cross-over cable.
Check to be sure that the operating parameters on the terminal or
the terminal emulation program, if you are using a personal
computer, have been set correctly. The default settings for the
RS-232 Terminal Port can be found in "Starting a Local
Management Session" on page 71.