I spent 45 mins on the phone only to find they don't know.
While the Ooma service has been fine For the past 2.5 years, I'm disappointed that the Scout died in such a short time.
But Ooma tech support is to be commended for it's incompetence and quantity of ums, pauses, "let me put you on hold for a minute" and general babbling while getting to the point of "maybe".
For your reference, check this thread out: viewtopic.php?t=12096murphy wrote:Is the Wall jack of the hub connected to the Wall jack of the scout?
Sit them side by side and use a direct cable to test.