Yeah, each extension in Axon can be set to forward to a number after a specified number of seconds. I think it should work fine if you have it forward to the URI address above.. if not, try setting an SIP rule in your dialing plan which essentially tells Axon which VoIP line you want to use to make the call. I'm not exactly sure how the feature is intended to work, but I think it means if you put proxy01.sipphone.com as the host and set it to dial on the same gizmo line, perhaps it just dials the 1747XXXXXX directly or it still dials the full URI but at least it is using the correct line and not something else (e.g. the internal extensions line).