Call forwarding from Google Voice

I have a Google Voice number that forwards to a cell phone and to the ooma office number. When a call comes in it rings correctly in both places. If it is not answered it pulls back to be handled by the GV voicemail. Google tells me that the cell carrier has a setting called “conditional call forwarding” that, if set off, will allow the call to stay with the cell phone voicemail. I am trying to find something in ooma that does the same thing, but the support people tell me there is no such thing. Does anyone have any experience with this? Is it really impossible? I want an unanswered call to be answered by the virtual receptionist. Thanks.

Under Receptionist | Settings you can enable ‘Ring for two extra seconds before answer’. That will make Google Voice think a person answered rather than a machine.