RamanRoy They don't have to dial 911...they can dial into EMS call relay centers, which aren't blocked by VOIP.
Please see my video on Youtube where it happened .... https://www.youtube.com/watch?v=qoRfXeFrlbA
I thought they were messing with me but it is real, there is a national 911 call relay center. I really thought it was scammers being stupid scammers but turns out it was real 911. This was after calling them 20 times at least lol. You've been warned...now whenever they say "wait a minute right there sir" and dial something else on their phone I hang up.