I have a 4 port one of those as well (in fact, the 8 port no name brand one was replacing my 4 port Belkin). My Belkin supported PS/2 for Mouse/Keyboard and AT Keyboard and Serial Mouse. I could hook up any combination and it passed or adapted all the signals. Very nice unit. Worked pretty well, although I had some problems with it syncing to Windows NT 4 (I would have to wait about 30 seconds after switching to an NT machine before I could use the mouse, if I tried before waiting, it would just randomly bounce all over the screen clicking... I got myself into a couple of bad situations that way as it decided to click on the wrong thing). I originally was looking on ebay for another of the 4 Port Belkin OmniView units I have, but all the used ones were going for close to, or even over the price of the 8 port no name one I got. And none of the Belkin ones had cables or the rack mount frame, which meant the final price would be even higher. So I gave the no name brand a try, and I've been very happy with it. The other nice thing is the Belkin took up 2.5 rack spaces, which means if I got a 2nd one, I'd have lost a total of 5 spaces to run 8 items. The no name brand is a 1u device so I saved quite a bit of rack space. -chris <http://www.mythtech.net>