hi http://voip-info.org/tiki-index.php?page=Low%20Bandwidth%20VOIP tells me it's possible to do <= 10kbps (or that someone thinks so), although http://voip-info.org/tiki-index.php?page=Bandwidth%20consumption tells me the lowest possible would be G.723.1 at 5.3kbps, resulting in a total of 20.8kbps including IP overhead, and the a little more if running RTP. What would you suggest to do to save as much bandwidth as possible, while keeping the quality at a "respectable" level? thanks roy