I still can't believe being without VoXalot one day!
Meanwhile, thinking about possible alternatives:
Libera Il Voip
LIV is my favourite, right behind VoXalot.
If you speak Italian, I think it's very easy to set up everything. But even if you don't speak Italian, you get around pretty well.
Besides a main number, you get 5 extensions.
It's possible to register VSP's, set up call back etc.
If you wish to sign up, you'll need a
codice fiscale..
See also the LIV
FAQ-page.