You talking about the power cable? It takes the same type of power cable that you CPU or Monitor takes. Check out their website here http://www.pkworld.com
It's apparently a telephone connection on the ups end and a serial cable on the cpu end. I have no idea where to get one as the company's web site (www.pkworld.com) seems only to be a sales site and has no information or tech support options. I can't even find a local retailer that still sells this brand, although it's supposed to be one of the best.
Does anyone have any idea where to download the software for this for Windows XP? The pkworld site does not have any tech support or any other useful information.
This should be a standard 9-pin serial cable. APC uses 2 types of data cables. Full duplex and half duplex data cables. The telephone and NIC cables are standard too