After a couple of years a client is interested in getting off traditional phone and going VOIP. The recently had an outage in the area cough ATT that lasted 2.5 days and it took ATT 2 hours to change forwarding. I have tested doing an wireless backup at the location because it seems that when one carrier goes out the other on the street also has problems. I currently self host myself at my location using FreePBX as a vm and a clustered server with battery backup, and besides a few config errors have had 0 downtime (knocks on wood). I am just trying to get some community thoughts on what they have done with clients on the PBX front.
Any tips or suggestions woudl be greatly appreciated