Point is, the properly configured PAP2 will meet the standards.
It even has enough ring power to ring the bell on a 2500 set. 3 of 'em, in fact. (I didn't try 5 to see if it delivers a full 5 REN but I expect it does).
As far as TDM systems lasting forever, they do. It's just that technology marches on and something as trivial as caller-ID is "sorry, can't do that. Not with out a special board that's as rare as rocking horse turds and has a price tag to match".
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