I am trying to add two call routes with the same number and same route.

I am trying to have an incoming route for number 555-555-1234 go to busy and also outgoing route for same number go to busy.

It only seems to keep one, I can't seem to use the same number for an incoming and outgoing number to go to busy? Am i doing something wrong?

I am trying to use busy as the ROBOT voice is hard to understand and kind of lame.