!!! FotoConnection - STAY AWAY !!!
Their prices are good, but overall it's not worth it.
I've had a bunch of friends use them, and read a bunch of reviews. They are horrible.
Unless of course, you enjoy being:
Billed wrong, shipped the wrong product, being hung up on by their customer service, not getting replies to emails to customer service, taking 3-4 weeks to get your product instead of the 3-5 days they told you, items being "out of stock" / "on back order", yet they didn't bother to tell you, billed you right away, and told you it'd ship the next day, etc, etc.
RS-232c - is used for controlling the unit remotely using a 2ndary device. ie: The video projectors we use at the university I work at use AMX control systems to control the video projector using the rs-232 port. We can program it to do many things: turn it on/off, switch inputs, make image adjustments, etc. using a touch screen, buttons on the wall(old), over an ethernet connection (netlinx).
RS232 on a receiver I suspect it could be used to control the receiver using one of the nice wireless touch screens. 12" & 15" Modero Touch Panels at the bottom of the link.
http://www.amx.com/new-products-public.asp.
Press theater, the lights dim, the receiver switches to theater mode, screen comes down, video projector starts up. Touch screen gives you an option to pick a movie to watch in your 100 disk DVD changer.
Reorx