This test code indicates that the ATM ping operation cannot be
initiated or is aborted because the circuit is down because of a OAM
fault condition. This is possible if juniAtmCircuitVcOamOperStatus is
one of the following:
oamVcOperStateAisState(0) - AIS cell received or underlying
physical layer reporting transmission
path AIS.
oamVcOperStateRdiState(1) - RDI cell received.