We have a BCM 50 with an 1130 Ip phone at a remote site. The phone connects to the BCM through a VPN. That site is connectted to 2 other BCM's through VPN's. The phone works if I call the office it is connectted to. When I try to call the other 2 sites, I can connect to them, but no audio passes through. We checked the routers and made sure that the peer to peer setting is enabled. The connections at both sites are dsl. Any thoughts on what is not letting us pass audio?

It could have to do with the router setup - is there an option to send ALL traffic across the VPN? Often the router only sends traffic destined directly for the remote VPN network across the tunnel. Maybe your phone is trying to talk directly to the IP's at the two other sites (via the ISP gateway).