I'm looking for an application that converts my Android phone in a switchboard. The goal is to have the ability to redirect the incoming calls to another telephone number. But if this is not possible (I don't know if any Android terminal is able to redirect calls in real time), perhaps there is an intermediate solution: the mobile pick up the telephone, launches a recorded message ("Please, say what is the purpose of your call"), waits until the user say something and then put a music loop until somebody pick up the telephone.
I don't know if I explained :) But the final goal is to substitute an expensive internal switchboard by an unexpensive cell phone network driven by an Android app. Is there something similar?