I have recently taken over IT support at one of our locations and no one knows the password to the DVR there. It has no identification marks but does show an Optivision logo when it boots. I've opened it up and pulled the cmos battery which cleared the date, but I can't seem to find the default password.
It takes only numbers, up to eight characters and I've tried many standard passwords ranging from 4-8 characters. Can anyone help?
I've attached pictures.