We have a Samsung SDR-5100N camera system that allows us to watch it remotely using the iPolis app on iOS devices. If we leave it running on our iPad for continuous monitoring it appears to time out / lose the connection after 24 hours or so. This happens whether we are at home or outside of the home. Is there a setting we need to change or equipment we need to purchase to have un-interrupted monitoring from our iOS devices? We have a Xfinity router/modem. Unrelated question: can we upgrade our current cameras with HD cameras that have audio using the existing wiring?