As far as I can tell after looking at all my OBi devices, the check-mark option on the OBiTALK page I referenced doesn't appear when the SP is configured for Google Voice (vs. a SIP provider) on the OBi 200; sorry for the confusion.
The check mark to the left of Google Chat, on the correct Google Voice account's settings page, should be sufficient to make it ring on the OBi, as long as you are not also using Simonics gateway.