Thanks for the reply. I used a voltmeter to measure at a telephone jack, as well as the test jack outside my house.
VBAT is 13V(11.5V). TripRing voltage is 0V. No phones are connected to lines, but Obi is connected to the phone port. If I disconnect the line from the Obi to the wall jack, there is no change ion parameters.
The Obi worked well over the past 18 months. Before that, I had issues with lightning storms killing the Obi, so I installed a TripLite suppressor for all my network devices. Maybe a spike got through the filter?