Trying to control a clients existing rsp-1068 and getting no response, but I can control it from hyperterminal. I can control a russound and panasonic plasma via rs232 easily from this RP6 but for some reason the Rotel is being finicky.

From their protocol doc, power-on is: FE 03 A1 10 4B FF
I've tried no spaces, various delimiters, carriage returns, line feeds but no luck.

Anybody had success with Rotel?
Thanks
Cal