I had trouble posting a reply to this board, so Chris and I took it off line. So far we've exchanged 6 emails or so each, and I've given him all the info he's been able to think to ask for, but our system seems to be non-standard in some way, and he has not been able to figure it out.
Frankly I'm not knowledgeable enough to tell you the problem, except that everything seems to be programmed to extension 300, but we can't find extension 300 anywhere. Something like that anyway.

A computer is like an Old Testament god, with a lot of rules and no mercy. - Joseph Campbell