3Com OfficeConnect User Manual - page 79
6
P
ROBLEM
S
OLVING
The OfficeConnect Switch 140M has been designed
to aid you when detecting and solving possible
problems with your network. These problems are
rarely serious, the cause is usually a disconnected or
damaged cable, or incorrect configuration. If this
chapter does not solve your problem, contact your
supplier for information on what to do next.
Perform these actions first:
■
Ensure all equipment is powered on.
■
Power off the switch, wait about five seconds and
then power on the switch so that it performs a
self-test.
The self-test only takes about eight seconds,
during which all LEDs light briefly and then the
Alert LED remains lit until the self-test is
completed. If the Alert LED remains lit after the
self-test (allow the unit a few seconds more),
there may be a problem with the unit, refer to
“Solving Problems With the Switch”
If you have a problem using the serial web utility,
refer to
“Solving Problems With the Serial Web Utility”
Isolating a Problem
A good way of isolating a problem is to see whether
it occurs on a particular port only. This can be done
by:
■
Using a different port to see if the problem still
exists.
■
Using management to view how a port has been
set up. In particular, see if the port is disabled by
management.
Check the Alert LED and if lit, use the Alert LED page
in the web interface to see what condition is causing
it to light, refer to