> Flow controll settings? The port doesn't have the clocal bit set? The
> cable's not passing DTR or DSR right?

It turns out the gsm modem I was using did not have a carrier detect line=
, so=20
setting the CLOCAL bit solved the problem. Of course, including the line=20
"local" as an option in the ppp setup script has the same effect.

Thanks for the help!