I've got a colleague with an Ooma Telo. We realized today that when he calls me from his Ooma, the dual ring does not work. The Telo handset rings, but not the cell phone. He tried calling from a different phone and dual ring worked perfectly, as it has been for every other call (that I know of).
A quick search of the forums didn't reveal a similar discussion, but any pointers are welcome if this is already an identified issue. I do not know if this started with the recent firmware updates or not; we are both on 41189.
Thanks in advance.