Is there a way to set up two devices on the same extension in IncrediblePBX? The Grandstream UCX6116 has a feature called "concurrent registrations" that allows for this. Very useful to enable remote users working from home to use their office extension transparently without setting up ring groups etc. Would like to do something similar, basically set up a softphone on my iPhone so I can answer calls when I'm away from the desk. Doable?