bdalida,
We're about to do the same upgrade.
I'm pretty clear from the documentation that the 2 sides each have to start with different lead digits to make this work. Was this a new install for you or did you have to make numbering plan adjustments to accommodate existing extension numbers with similar lead digits residing at both locations?
Also, did you have to match the number of externally received DID digits to the internal DN digit length number? Or perhaps your system was already matched?
All of the Norstar documentation examples show equal digit lengths (internal and external) and so that is one of our questions before we pull the trigger and try to make the APN/ Centralized VM work. I wouldn't think that it matters since external DID digits can normally be any length relative to DN length. But unfortunately, the Norstar documentation is not really very complete or specific about answering questions depicting different scenarios.
Besides the DID target forwarding, what were some of the other sticking points that caused the gray hairs?