Steve Bellovin <smb@research.att.com> writes:

> > The 600 use a DSP, thats one reason why I didn't by one.
> > There is no support for a free unix version.
> 
> They use a DSP for the serial port, and not just for the modem?  I
> was asking about the former, not the latter.

The built-in modem is a win-modem-like thing using a dsp. The serial
ports are real serial ports, you just have to enable them in the bios
(with the ps2 dos utility -- cf. TFM).

I'm not sure, but I got the impression that the 600 has just one
serial port, and some kind of (software) switch for Cu or IR, but the
600E has two ports (Cu and IR).

/Johan