In dealing with a few rogue 911 calls, I have re-visited the way we configure our trunks to better handle emergency calls.
Currently I setup an outbound route with any dial prefix and 911 as well as just 911, this route has the emergency route type and has the override extension Route CID options checked.
This should then force the outbound route to the correctly setup 911 CID and avoid Rogue 911.
I then setup the Emergency-911 Route as the first outbound route.
Is this the preferred/recommend way to accomplish this?
I do understand that I can set the Emergency CID by extension gaining better control as well.