Thank You Very Much Carl.

Now THAT is truly USABLE info !!!

Given that this old plug has both analog and digital cards (and spares...) my thought was to merely program it for busy/no answer transfer to either sort because all that is happening is really a few POTS lines coming into a single station, answered and/or transferred to one other station-> or not, in which case it will roll to VM.

No extension selection will be used and the callers will simply either reach a person or the single VM box.

This stuff reminds me of the truly ancient PC h/w that I still have in use that is utterly reliable like the K6/2-350 system I use for a business firewall that runs 24/7/365 and only requires MAYBE monthly restarts - and the old, slow, big IDE drives that never seem to get any data errors.

What seriously tickles me at this site is the sponsorship (ownership ?) by Usedphones.com !

My sincerest thans Carl, and Best Wishes !