No ring generated

I'm having an issue with my 110 where it won't ring the attached phone if I call the Google voice number it's configured for again. However, if the Google voice number is called, I can pick up the receiver on the phone and the call connects. Also, it doesn't ring if I call the PSTN number attached either. It doesn't even connect if picking up the receiver. However, the phone does ring/connect if I attach it directly to the PSTN. I've tried resetting the config, reregistering it with ObiTalk and letting ObiTalk control the settings (this time). I was doing a custom config the last time it worked, but I hadn't changed anything between the time it worked and the time it stopped working. Also, I tried calling out from Google chat directly, thinking that might be an issue. However, it sounds more like an issue with the ring voltage not being generated. Any ideas?