I dialed from my CallCentric number to the same party whose POTS line had called my Anveo line for one of the main tests of this thread, and interestingly enough, Bell's CNAM dip came up empty !
I think you'll find Bell will never query a database other than their own.
They will show a name if its included in the call setup, however.
Same goes for Telus out here.
I guess that that makes sense, from THEIR corporate perspectives, and I see that PX reached a similar thought as yours.
"in the Call Setup" - does that mean "if it is sent on-the-fly by the caller's phone provider" ?