From a recent post on the openbsd ports mailing list:
I've being using asterisk for 2+ years now running 4 boxes and I can tell you that
going with FreePBX is a pain.
After all of the pain with it I moved into OpenBSD with plain text
file configs and the results were just fantastic and my config files
are now human readable.
I'm trying to compile my experience here:
Hope this helps, really.
I have an aversion against phones, but this may be useful for somebody else