Well, I wouldn't go to expert programming tab, unless knowing exactly what to do - from the experts like you
By the way, I've followed your recommendation (thanks!) and it seems all works well. Anveo accepts calls while GV sends them out. I am just a little bit confused with E911. I made a test call, thinking it will go out from my Anveo number. However, the person on the other end told she got a number starting with 267 area code, while my area code is 613. Is this supposed to be that way with E911? And yes - I double-checked the settings and E911 is set with Anveo only.