Indicates mandatory state of the VTU-R line. This is a
bit-map of possible conditions. The various bit
positions are:
0 noDefect There no defects on the line
1 lossOfFraming VTU-R failure due to not
receiving valid frame.
2 lossOfSignal VTU-R failure due to not
receiving signal.
3 lossOfPower VTU-R failure due to loss of
power.
Note: the Agent may still
function.
4 lossOfSignalQuality Loss of Signal Quality is
declared when the Noise Margin
falls below the Minimum Noise
Margin, or the bit-error-rate
exceeds 10^-7.
This is intended to supplement ifOperStatus.