I've been fighting with the OBi110 for a LONG time. So frustrated! And it turns out it was the wireless bridge setup I was using.
I setup another dd-wrt flashed LinkSys router as a wireless bridge (communicates to the main router via WiFi and has 5 wired network ports). It (seemed to) worked perfectly. I could put a PC on it and all was fine. I could send and receive info from the OBi110 setting on one of the ports on the bridge. I could get Google Voice setup. BUT, and this is a big but, I could not get it to call via GV.
I tried map after map. No luck. I got frustrated and quit trying and a year later decided to try again. No luck. Was there some other setting messing with success? There must be a million OBi110 settings, which one was causing the problem?
Then I decided to connect the 110 directly into the main router. BINGO! It now seems to work. For the longest time I was so frustrated as to why what worked for others didn't work for me. I apologize for all those things I mumbled under my breath, and sometime aloud, about the OBi.
For those having troubles and you are using a bridge setup, try a direct connect. I have no idea why it did not work and I don't have the enthusiasm to find out why.