Indicates mandatory state of the VTU-O 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-O failure due to not
receiving valid frame.
2 lossOfSignal VTU-O failure due to not
receiving signal.
3 lossOfPower VTU-O 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.
5 lossOfLink VTU-O failure due to inability
to link with VTU-R.
6 dataInitFailure VTU-O failure during
initialization due to bit
errors corrupting startup
exchange data.
7 configInitFailure VTU-O failure during
initialization due to peer
VTU not able to support
requested configuration
8 protocolInitFailure VTU-O failure during
initialization due to
incompatible protocol used by
the peer VTU.
9 noPeerVtuPresent VTU-O failure during
initialization due to no
activation sequence detected
from peer VTU.
This is intended to supplement ifOperStatus.