I have set up my elastix box quite easily, but I have a small issue. I would like to know if there is a way for me to barge-in a current call and make it a conference call. I.e, User 1 is talking with someone using the Linksys SPA3102 I have for the PSTN line. Could I call a number and not just listen (like Chanspy does), but also talk? In other words, make that call a conference call? Since it's a home setup, privacy is not an issue. Is it easy to script such a feature if it's not yet available?