Um what? Is PRZ involved? Is he ok with your using that name? He had something called PGPFone a long time ago, though it didn't get much traction. There have also been tons of other encrypted voice programs.

Obscuring traffic patterns without stupendous amounts of dummy traffic is quite difficult. That someone is connected to your network at all is already a huge giveaway. I have trouble seeing how something like this can work without a very big operator (think Cloudflare or AWS) being involved, and anything that size would have to get in bed with regulators. It's a lot easier if you're only trying to do low bandwidth text.