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    Question about ONVIF compatibility of DVR/NVR/HVR and IP cameras

    Let say I found a NVR that I like and it list ONVIF 2.2. While researching for cameras, many of them have different ONVIF version numbers like 2.0, 2.1, 2.2, 2.3, and 2.4. 1) Would cameras with older (2.0-1) ONVIF versions work with NVR ONVIF 2.2? Is there a such thing as backwards...
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