How do you block invalid numbers?
I can't understand why spam calls using numbers with a valid STD code but without enough valid digits are routed at all - why aren't they just dropped by the system? If they are foreign numbers there seems to be some numbers that report the international dialing code prefix, others that don't. How can the system route the number 0000000000 - a simple "if calling number valid then route" test would wipe out 50% or more of my spam calls ...
Biting the hand that feeds IT
