I just got Obi110. It took me few days to complete the set up because my router, airplus101 300N(AR680W model) doesn't work. It can not get IP address from router.
Just before I gave up, I tried it on my Verizon router(purchased at $8) for backup purpose. It works perfectly fine.
What I notice in the Obi110 set up. It allows me to put two GV number. One as primary, guess will be used to show on the call ID. Are you talking about this type two lines or you mean something else ?