This attribute indicates the current flow control status of this
GsmIwfBearerChannel for an asynchronous call. For a synchronous
data call this attribute will be set to noFlowControlActive. Valid
values are:
noFlowControlActive, There is no flow control active over the air
interface and network interfaces. The applications at the end points
handle flow control.
inband, Embedded characters in the data stream indicate flow
control.
v110FlowCtnrl, Utilization of V.110 flow control.
errorCntrl, Flow control is handle by datalink protocols.