Biztel - No worries on the delay. I hope you are feeling better ;-) I hope to find some time to work on this further tomorrow. I'll be sure and post back.

I ran some wireshark captures today on a local SMT-i3105 that works fine. I believe I now have a clearer understanding of how traffic is passed between the OS7400 and the stations.

I have a feeling my problem is with outgoing NAT's and RTP traffic. I ran out of time today but I'm thinking source ports are being randomized by my firewall.

I have a pfsense box in production but have been testing Untangle. Does anyone have a working config on either of these platforms?