I have 4 vonage lines comming into a dialdictate 3.1 server using the Linksys Vonage Adapters. I also have dialdictate 4.11 site license on a XP Pro Server using vonage softphone lines. You can get two simultaneous incomming calls on one softphone line. Since I skipped version 4.09, I do not know if it was VOIP compatable. If it was, use the softphone, if not, you can use the vonage adapter and connect to your telephony card like a normal telephone. You may need to to use port forwarding to get the VOIP ports through your symantec firewall.