Currently, we are using a system similar to an IP hoot and holler. It is made by ETC and uses a voice gateway. I can include a diagram if nec. The issue is that NOW, across the local and wide area, instead of a one to many situation, we need to have a many to many multicast situation. Kind of like a voice Party line. My question relates to the router [6500 MSFC] configuration needed. First of all, can cisco equipment support this idea. Secondly, I can attach the current configs but the question is how do we modify them? Any thoughts would be greatly appreciated.