This attribute displays whether the far-end SEF/AIS defect indicator
is transmitted over the outgoing line when the E3 component has
been unlocked or used in operational testing. When the E3
component is locked and not used in operational testing, this
attribute is always set to off. The far-end SEF/AIS defect indicator is
transmitted over the outgoing line when SEF/AIS defects are
detected on the incoming line. In G.832 E3 Framing mode, the
FERF bit is set to '1' to transmit the SEF/AIS defect indicator.