Harriszach

Gretings all, I have a RealSync 4 cam dvr system from PC Club (a nice unit). I want to hook up a PTZ cam and the support from these guys is horrible. Using the device below, which wires from the PTZ dome cam go to which terminal? http://www.sadkin.com/RS485.jpg Also, will the system just know this is hooked up to the right cam? The system has PTZ ability on every cam screen, but I have never hooked one up before.[/img]

I bought the converter http://www.sadkin.com/RS485.jpg On ebay for like $8 (china) so I don't even know if this is what I should be using. I didn't see any dip switches in the pic. Can you give me any idea as to what I should be spending for a good converter (with dips)? Also any ideas on where to get the best price on an outdorr small dome ptz cam? Thanks again.

VERY helpful! Thanks.