BA_RJT is an abnormal response to an ABTS command if the ABTS request cannot be processed. There are several reasons why this may occur, including an invalid OX_ID or RX_ID.
RMC is used to request an immediate Class 1 or 6 disconnection. The recipient will abort any current sequences and exchanges resulting in possible frame loss and will send a final ACK frame.
PRMT is used to terminate a Class 1 or 6 connection if it is required for a higher priority connection.