I ran into this issue today Jun 14, 2016. I have my Obi100 configured with SP1 for Google Voice and it worked fine till yesterday. Today when I checked, it was on 1.3.0 build 2872 FW. And saw this message on their portal ("Acquiring Service (0)", or "OFFLINE" in ObiTalk DashBoard).
After spending some time googling, found a fix - Manually upgrade the FW to OBi110-1-3-0-2886.fw. Even though it s for OBI110, it will work for OBI100. Just wanted to share this and hope it helps someone out there !!