Amit Nagpal writes:
We could just say that we are using OpenSER as our proxy. How can we restrict un-registered, (but otherwise configured & legimitate) users from making out going calls?
you need to write your openser.cfg in such a way that it checks if the user has any registered phones (doing lookups on all uris that this user may have) and let the invite go through if you find one.
-- juha