It is not the ring that is odd. You are right that the controller determines whether the phone rings. What is odd is that the call is answered and hung-up. If the phone is disabled (i.e. in the water), the phone should roll-over to voicemail.
I dont think the calls were answered by anyone..but maybe I missed a report. There are so many of them right now.
Yep. The controller makes a decision to hang up the call. I get those sorts of things all the time on my cell phone.