Google now owns Gizmo5. One of the options in Google Vocie is to route inbound Google Voice calls to Gizm5 for a SIP connection. I have successfully built a GIZMO5 SIP connection into 3CX, but calls will not complete. Calls ring into 3CX from Gizmo5, but they have no audio when answered and do not register with Google Voice/Gizmo5 that they have been answered. I have read in the forum others that have the same problem but in all the postings there has never been a reply about what is missing to get 3CX to work with GIZMO5 inbound calls to 3CX. Trixbox and other virtual PBX platforms seem to work fine so this seem a specific problem only for the 3CX platform. There are posts all over the web about this deficiency but never any discussion on a solution. Has anyone every gotten this to work and, if so, what is the magic? Thanks!