6 Apr
2018
6 Apr
'18
3:04 p.m.
One can analyze the calling frequency, but even that's problematic as it can penalize a successful customer that isn't scamming. Besides as HAL wrote many of these calls are not originating in NA. If digital residential lines hadn't died they might make the original source visible making it easier to decide if the call seems legit, but for now an auto-attendant seems the easiest solution. /mark