But if all of your trunks are two-way, and someone dials in the secondary number instead of the main published number, it will still ring on your console.

Glad that it helped. If you were not in so isolated a location, I would have suggested that you find a Mitel dealer who is more cooperative, rather than undertake so much programming on your own. Also, there is an individual who posts here *coughFIFTY5FOOTERcough* who conducts training for Mitel systems.