Hi everyone - thanks for the input and the entertaining debate about bots.
Confirming that the camera powers up and LEDs lights come on - so definitely compliant with my friend's POE switch - and not using any other power source.
@Mark_M - thank you, let me take apart the camera and see if I can identify this or find any reset buttons.
@Mike A - how would I change the IP of the device trying to access the cam? (apologies - a rookie at this stuff). We have tried plugging the camera directly into a laptop and then typing in the cam's IP. Have also tried connecting the cam directly into the router (providing power separately) but again the camera would not register on the network, so couldn't access.
@fenderman - you mention I am potentially on a different subnet... how would I confirm this and / or rectify?
Thanks again for all the support with this.