Thank you for the fast reply
The current firmware is 1.12.03 (updated before I left)
Can't remember the router mfr or model, it is however not a D-Link router
Wireless N (I believe, it's a wireless N router and the cameras are the only things currently connected to it), the Dcs5010L is around 7m away from router , however I don't believe this is a problem as my other camera is further and is still operational.
I have reserved IP addresses in my router for both cameras (192.168.1.12 and .14)
I also enabled both of these options before leaving, and checked the router's upnp table, everything was perfect.
Basically i'm just looking for some magic code that I can send the camera that gets it to restart even though it's being unresponsive :-P tough luck right?