I am having the same exact issue. I called obhai but they couldn't figure out what was going on either, they had me submit a support ticket to see what they can do. If I keep having this challenge I will probably buy one of the Cisco SPA 112 that is compatible with RingCentral from Amazon. I was really looking forward to use my Obi100 with RC since its worked so well for me while I was using it with Google Voice.