Troubleshooting
Problem
Solution
The TX and RX connections are reversed.
Make sure the fiber connection is made so that the TX
of one end is connected to the RX of the other.
Poor connection between the ADAM-4542+ and the
communication port in computer.
Make sure the ADAM-4542+ is securely plugged into
the communication port.
Attenuation on the fiber causes the signal level to drop
below the accepted level.
Reduce attenuation by reducing connector loss,
transmission distances, etc.
The connection between the communication ports is
neither DTE to DTE nor DCE to DCE connection.
Add a converter to one of the optical modems, so that
the pin assignments from the communication port to
the modem are from pin 2 to pin3 and from pin 3 to
pin 2.
Damage Test
If none of the above resolved your problem, your module may be damaged. To test for damage, use the hyper
terminal program of MS Windows to perform a loop-back test of the optical modem. This will detect if the module
is damaged.
Ring Operation System
Startup Manual 6
