I just switched from DTV to Charter Digital Cable. I was overjoyed when I saw the serial port for controlling it with the Tivo (rather than the IR). I can't seem to get it working, though. I read the ...

The device shown in Figure 17-1 is an RS-232–to–TTL converter board, designed to allow a PC with a serial (RS-232) port to communicate with a device that has a console (TTL) port. External converters ...