Hello guys my name is Tony & I'm new on the forum..
my background is video editing, a friend shop was vandalised and he called me to assist him get the footage from the dvr..since i didnt know the make & the fact that it was a linux embedded dvr it took me quite a while to extract convert & edit the footage..but anyway that was my first with that & he's now told his colleagues that i know "a lot" about cctv & dvr's..
my question is, what are "must know" basics that i need to have, say if i wanted to be salesman for cctv co. ?