At 12:06 in the video depo BC says clearly that he was using Cisco VoIP on his home phone line and he installed it in the January or February of 2008. To do this he needed to have a router with an FXO port in his home.
I believe we all have agreed he had a router/FXO in his house earlier in the year. But there is no evidence he had it in July. He removed the system in April