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I got lots of problems after upgrading from" V.001.xxxxx" to V4.002.0000000.6.R, Build Date: 2022-11-15. As far as i think my 5216-4KS2 was the "old" version "1". The problems: audio settings greyed out, motion detection not working anymore on several non-Dahua IP-cams, alarm box not...

After i upgraded to this firmware DH_NVR5XXX-4KS2_MultiLang_V4.002.0000000.6.R.221115 on my NVR5216-4KS2 (version 1?) motion detection on some older REVOTECH IPCs did not work anymore, audiosettings were not available any more.

alarmbox feature added with firmware version "NVR5XXX-4KS2_MultiLang_V4.001.0000006.0.R.210208" (see release notes)

NVR 5208-4KS2 (Version 1) Firmware "NVR5XXX-4KS2_MultiLang_V3.216.0000005.0.R.20190125" = no alarmbox settings. Firmware upgrade to "NVR5XXX-4KS2_MultiLang_V4.000.0000001.5.R.20191218" = no alarmbox settings. Firmware upgrade to "NVR5XXX-4KS2_MultiLang_V4.001.0000000.0.R.200221" = no alarmbox...

but my alarm box worked with 5216-4KS2 (V1) until i made several installation with loose power connection for alarm box and accessoires. now no alarm box will be recognized any more, even the new one i buyed.

Hi, i bought an used Dahua NVR 5208-4KS2 (V1) with an old Firmware installed "NVR5XXX-4KS2_MultiLang_V3.216.0000005.0.R.20190125" As the AlarmBoxes were not offered in the alarm settings i upgraded to "NVR5XXX-4KS2_MultiLang_V4.000.0000001.5.R.20191218" Everything workes fine, but no alarmboxes...

Hi, i'm interested i securing my flat. After buy and try with some cheap and easy DVR / NVR i bought DAHUA 5216-4KS2 (V1?). I added an DAHUA ARB1606 (AlarmBox). First it worked fine but due to some loose contacts during installation i destroyed the RS485 input chip? from the NVR, the alarm box...