This attribute indicates how to handle the congestion indication to/from the mux internal connection side (for example transmit/received becn to/from the network). no - do nothing flowControl - translates the congestion indication between the port and the internal connection port according to the definition of the prtInPh1MlFlowControl parameters. The operation is done on both directions. toFlowControl- translates the backward congestion indication received from the internal connection port (normally the network side) to flow control and do nothing in the other direction.