ADD-WABE
type = dgts
dgts = XXXX&&YYYY
dar = STN
The rest is optional (dpln = 0 if it makes you) unless you have to to special routing for the IPDA, in which case after you're done you would do
CHA-WABE
type = dgts
dgts = XXXX&&YYYY
route = (route number of that IPDA if that applies)
rest is optional
I am not into IPDA yet, but could be close. I am used to 9006 routing where each site has a standalone switch with its own dial plan and you have to route calls to it. I think for an IPDA because it's all routed by IP the network probably handles all that, so you might only need the first part.