R373:CELL_SERV_OOS
If the main BCCH of a cell is faulty, this cell is considered to be out of service. This measurement provides the cell out-of-service duration.
s.
This counter is measured when the BSC detects that the main BCCH of a cell is faulty.
In some occasions, this counter may have an error of five seconds (the sampling period).
This is an original counter without involving any formula.