Conduct a loopback test to test ports outside RealPort (all UNIX and Microsoft Windows operating systems)

Note This procedure is not applicable for EtherLite, Digi passport, or Digi CM devices. Refer to Test communications for procedure for testing ports within RealPort.

1. Plug the RJ-45 loopback plug into the serial port to be tested.

2. From the command prompt (or Start > Run in Windows), telnet to the IP address of the Digi device using the following command from your UNIX prompt, replacing ###.###.###.### with the actual IP address of the unit:

   telnet ###.###.###.###

3. Login as root (default password of dbps).

   From the Digi device root prompt:

   #>  set line baud=(baud_rate)  range=(port_number)

   #>  set port dev=prn auto=off range=(port_number)

   To configure testing at 9600 baud:

   #>  set serial port=(port_number) baud=9600

4. Kill any residual processes on the port:

   #>  kill tty=(port_number)

5. Connect directly to the port:

   #>  connect (port_number)

   You will connect directly to the port and see any incoming data from any device attached to the port. By inserting the loopback plug shipped with the Digi productinto the appropriate port, you will be able to view any data typed on your connect session. Removing the loopback plug will not display data typed on the connect session. If the loopback test worked, you have successfully tested the integrity of the port.

6. Close the connect session:

   <Ctrl> [ .    <Enter>

   Type <ctrl> [ followed by a period and the Enter key to close the connect session