I have a customer with (2) sites that have Verizon DSL Static IP on both sides. I have built an IPSEC VPN between both sites using WatchGuard Edge E10's. The VPN is solid and I can run all sorts of traffic over the VPN except Voice. It seems as though voice traffic fail with no reason that I or others can find. I have an IP phone in one site and an IP 406 in another (all running 3.1). The telephone in the remote site gets to the point that it will register with the IP Office system however once completed - nothing happens. I know that Watchguard is a DevConnect partner and Avaya recommends WatchGuard so I can't understand why I'm having so much trouble. Additionally - it is interesting that they are recommended since the original models recommended don't implement any type of QoS mechanisms!! Anyone have any ideas? Always seems that the phone can register but no additional traffic works.