This variable indicates the line level status of the
protection channel in APS. The
c64SonetAPSProtectLineStatus 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
4 sonetLineRDI
8 sonetBIPE(BIP-8/24)
16 sonetFEBE