Checking a High Speed Interface

If you are using a high speed interface, use the hsi_loop command to perform a loopback test to check the following components of your communications link:

• Software configuration

• CPU-to-card communication

• Correct operation of the serial port

• EIA-449 or EIA-232 ports and cables

• Local and remote modems

• Transmission line

If you see errors in the output, contact your local technical support for help in interpreting them.