If you're having trouble with a circuit, you can run a performance metrics (PM) test to diagnose the problem. The PM test is non-intrusive and can be done in less than one minute. This is the first type of testing you'll want to do to diagnose a problem with a circuit. Not all services are eligible for self-testing. If you select a circuit that is not eligible, Control Center offers the option to create a repair ticket.
To run a performance metrics circuit test: