Our is set to pick up after 4 rings. Works most of the time*.
*Situations where google voice will get the call include the following.
■ A call comes in while a number is being dialed on the obi connected handset
■ A call is already in progress, user does not switch to answer the 2nd incoming call.
■ The obi box is offline for whatever reason (power outage, internet outage, cat chewed through the cable, etc)
■ A google voice notification email comes through if the the caller hangs up before the answering machine picks up
There may be some other situations too. This is all I could come up with at this hour.
As you may or may not be aware of, there is a current issue with google voice and inbound calls. Sometimes (most times) answering the call produces dead air. If you're not already using callcentric's free DID for free CNAM and E911 ($1.50/month) you should consider it. This also resolves the current issue above.