How do I create a Direct Ring Out using RingCentral Phone API?

Not sure if it's possible using the .net sdk or via the api. I've built a "softphone" like application with windows forms using c#. It's more of a access gateway to ring central. Where actions taken on this application hits specific endpoints for the user to see. Giving the impression of a softphone. With that said... any dial out on my application uses the Ring Out api. Initiating the call from my app will "ring out" to the user's phone first. This requires my user to answer first. When Ring Central registers they picked the phone up, the ring cental backend will complete the call to what ever number was punched in. The direct ring out I believe you're trying to get at (IE: skipping the user picking up the phone first), is done with javascript using WebRTC. The call is placed and takes place via the web. The unfortunate thing here is the absence of the physical desk phone. Cool technology, just not ready for the .net applications yet. Hope my experience sheads some insight and value.

Does this number need to be in user contacts? rcmobile://call?number=1650xxxxxx
Also, is this the number or account id?
What is the expected result? RC softphone activating and starting the call?