My outgoing and incoming calls time-out (drop) at the 5 minute mark. Has been happening for several weeks. ISP checked internet and there were no issues (and I haven't noticed anything with my internet). My OBi202 is hardwired to my router so it's not a wifi problem.
Was there ever a solution to this? Asking as I'm experiencing the same thing...was working fine, but the audio goes mute now after a few mins (seems like around 5 minutes first time, then less that that if you try to do another call) and the call drops.