Wooohoooo!!
Hey nokia users, I could never get past the registration phase.. until now! The solution was, as usual, simple but *annoying*.
We already have an ATA connecting to voxalot on 5060 UDP, which is forwarded to it by the router. That seemed to be preventing my E65 from registering, until i changed to 4060 UDP and forwarded those to my phone!
Success!!
The moral: if youre behind a DI-624S router and already have an ATA registering to voxalot, youll need to use your nokia on a different port.
(question: is it bad to have 5060 simply forwarded to *all* lan ip's? I dont do that coz i feel its a bit messy..)