We recently upgraded a customer's Kentrox Q2200 to the Adtran 3430 to support bonded T1's. All existing configs are working fine, however I can't get the 5610 VPN phones to communicate with the router. I've had this working great with the Kentrox but can't seem to get past the IKE no response stage. Has anyone set this up using those phones? If so any guidance would be appreciated. I've tried duplicating the current Kentrox setup (with the exception of the WAN IP, which changed) but with no success.