ecpptest Test Modes

Connection Test  

Opens and closes the ecpp(7) device. No data is transferred. The test passes if the device can be open and closed successfully. The test also passes if the device cannot be opened because the device is busy with another process

Functional Test 

Runs the internal loopback test and the user can optionally run the External loopback test and Printer test. The test will fail if the device is busy 

If you invoke SunVTS through SyMON, the following Functional Test description applies: Runs the internal loopback test. If the device cannot be opened because it is busy, then it is assumed that the device is successfully connected to another process