ttn1: Thanks, that's what I thought it was for, but I thought I would check anyway.
I've ordered free samples of the MAX205CPG and the MAX235CPG chips, so hopefully I'll have a modem that has a better RS-232 compliance than +/-5V.
I've also seen a number of posts here that seem to be to the effect of 'Why bother modding the IO's modem, when you can just buy one?' ...ummm... Doesn't that defy the purpose of this board? In my searches of the board, looking for information on the modem, I've run across only one or two other posts involving removing the IO's modem and using it as a standard external modem. The same response was given there, 'Why remove it? You can just buy one for $xx.xx at suchandsuch.com!'
Anyway... I think I'm done for now, and will keep working on figuring out how to make the modem work right.
One last bit though, does anyone know right off where I could find the info for the pinouts on the female DB-9 connector that goes on the modem? I know enough to cross the RX/TX lines, so that when the computer tx's, the modem, rx's, and vice versa, but the rest?
Thanks for the help so far!