It's on their website in the support section.

[Link: kaleidescape.com]

It explains complete RS232 configuration for the Kaleidescape system. Be carfeul, the BAUD rate is not a common one, being at 19200.

If this is your first throw with RS232 control, you may just want to download their IR library for RTI and call it a day because Kaleidescape is a nasty one to learn on.....