What if you limited outbound routing to :

  • calls with an *
  • calls 3 digits
  • calls 7 digits
  • calls 10 digits
  • calls 11 digits


Use those points as a filter criteria.
Break the outbound routing into those categories,
so one 3 digit number never applies to four or more.

I think you do all this at some switch level?
Is there flexibility to filter the calls like I suggest?