Hi,
I'm pretty sure they were compatible, the only question is, were the printers compatible with the DPR-1260 print server, you can check out D-Link's support site for further informations about the supported printers but most of them were already supported, most of the time even though the printer wasn't on the list of compatible ones it would still work you just have to make sure that you are using the most updated driver for your printer.
I'd say they are compatible because the DPR-1260 is a network printer so it doesn't really matter what router you will be using.