This attribute records the hardware problems that prevent the bus
tap from using the associated bus. It may contain any combination
of the following values.
selfTest: the bus tap has failed its self-test
clockSignal: the bus tap is not receiving clock signals from the bus
parityError: the bus tap has detected too many parity errors on the
bus
Description of bits:
selfTest(0)
clockSignal(1)
parityError(2)