I have a bunch of Hikvision cameras and want to get a Hikvision NVR. I need Alarm IO, but I don't need POE.
I bought this NVR (NSN-616) from Nelly's and the specs are confusing:
http://www.nellyssecurity.com/media/specsheets/hikvision/nvr/nsn-616.pdf
It says the Alarm IO is optional. The one I...