This variable indicates which layer error statistics are
to be cleared. When this variable is set, the corresponding
current interval sample will be cleared.
The xylanSonetClearCurrentSample is a bit map represented
as a sum. So multiple tables can be cleared by one set.
The bit positions are :
0 None
1 Section
2 Line
4 FarEndLine
8 Path
16 FarEndPath
31 All