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    Dahua DHI-NVR4208-8P - how to downgrade firmware

    Hi there, I upgraded firmware on DHI-NVR4208-8P and IVS functionality is lost. Old firmware: V3.201.0000.1.R.20160409 New firmware: V3.203.0000.0.R.20170612 When I try to downgrade - I instantly get "Update failed!" followed by a reboot. I suspect it is checking for build date or version and...
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