We own DIDs.
We would like to find a cloud PBX which can connect to our DIDs using proxy. (static IP, username and password).
Calls have to be answer with automatic voice greeting, recorded, put in IVR cue (press 1, 2, 3 etc) and, based on decision tree, ansered by outsourced Call center which connect to this PBX using proxy (not voip client /URI)
PBX have to be manageable with drag and drop (see. pbxww.com as example) not with complex variable and menu (like freepbx)