This variable indicates the status of the interface. It is
a bit map represented as a sum, therefore, it can represent
multiple defects simultaneously. The sonetPathNoDefect
should be set if and only if no other flag is set.
The various bit positions are:
1 sonetPathNoDefect
2 sonetPathSTSLOP
4 sonetPathSTSAIS
8 sonetPathSTSRDI
16 sonetPathUnequiped
32 sonetPathSignalLabelMismatch