It was a bad PCI modem in the voicemail! No clue what happened at repair, and how they were able to dial into the VM. Whether they removed the card while working on it or if there's some type of short related to shipping.

Either way - when I removed the modem the VM answers on all four ports. When I put it back in it does not. We don't need a PCI modem. I don't care to troubleshoot if it's a short, IRQ conflict, etc. I'm just glad it's finally working!