This variable indicates the line level status of the
working channel in APS. The
c64SonetAPSWorkLineStatus is a bit map represented as
a sum of multiple alarms simultaneously. The
sonetLineNoDefect should be set if and only if no
other flag is set.
The various bit position are:
1 sonetLineNoDefect
2 sonetLineAIS
3 sonetLineRDI
4 sonetBIPE(BIP-8/24)
5 sonetFEBE