Update I managed to get all five of my cameras to work by updating the firmware of my Netgear WN3000RP wireless range extender. This update in conjunction with moving the extender to a better location resulted in all five of my cameras, particularly those further away, from being able to connect easily using WPS (it never worked previously and I assumed the D-Link cameras automatically avoided range extenders!) and now even some of my existing ones are now pointed to the extender. It works so much better with better connection, etc. Yay!