Quote Originally Posted by chevyman View Post
So is calling from extension# 1 to extension# 2 count as 1 or 2 active calls?
2

No minute charges with PBX. If you call externally it'll use the SIP credentials you plug in so that depends on the plan you're using. Calling within the PBX (extension to extension) wouldn't even hit the SIP account plugged in...it's stay within your PBX.