RIO Remote I/O System User Guide
SCO UnixWare troubleshooting
Page 294
7. In the tty menu, click on Port diagnostics and press the Enter key.
The Online Diagnostics menu is now displayed as show n in the next picture.
8. You can now select and run the type of test you want using the Online Diagnostics menu.
See one of the options listed in the next table for further details;
Test To run this test click on For details of how to run this test
see...
Send data to port Send data to port Performing the send data to
port test on page 295.
External loopback Perform loopback test on port Performing the loopback test
on a port on page 297.