@Balthus_nox
I have V4.002.0000000.6.R, Build Date: 2022-11-15 and still do not have my alarm box working
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 recognized.
The next problem: you can't fasllback from V4.
002.0000000.6.R, Build Date: 2022-11-15 to lower versions.
For that reason i had to buy an used older 5216-4KS2 (easier than to change all cams)
and upgraded from
"NVR5XXX-4KS2_MultiLang_
V3.216.0000005.0.R.20190125" ( no alarmbox settings) to
"NVR5XXX-4KS2_MultiLang_V4.
001.0000007.1.R.210827" (alarmbox sttings available, alarmbox recognized).
As the
V4.002. xxx firmwares have larger sizes than
V4.001.
i think the V4.002 is for the newer hardware, the 52xx-4KS2
Version 2.
i would suggest never to upgrade from V4.001.xxx to V4.002.xxx
(may be i'm wrong?)