> Hmm. I'll assume you cabling is ok. (You are using a null modem, right?,
> or a dumb terminal?) 

The cable I'm using is a Macintosh "printer" cable, which I believe has
the "null modem" characteristic.  In any case, It works when I ZTerm
on both ends, so I know that, at least in some configurations, that it is
a good connections.

I'm kind of wondering if there is some RTS/CTS option I need to configure.