I did end up having a few issues. A few cams insisted on dropping out at higher bitrates. Dropping main stream live along with recording, yet showing active live sub stream. These not all at distance, very weird as some closer than others.
I swapped cams on cables and issue pointed cables. Re-terminated all T568B, issue still existed on those same cables.
Same cams tested on 30m premade
cat5e coiled, not much issue at 12k+ kbps H.256, yet this one cam on installed run (of 6 or 7 cams total on 16) wanted to fail even at 6mbps H.265 within 5 minutes!
I did find the Hikvision equivalent firmware. I simply searched for 4.40.015 build 200616.... the old modified firmware on the device. Found the Hikvision file server portal of which two exist (Netherlands and United Kingdom).
This is an I Series Hikvision. Something like a DS-7732NI-I4/16P. Maybe it's not exactly...
BUT I SERIES FIRMWARE WORKS!
And it did fix the stability issue. I'd say there is an issue with interference on the cables found to have fault at high bitrates, yet the newer firmware solved the drop.
THIS WASN'T ALL A HAPPY STORY...
After the major firmware upgrade, I did eventually lose Hik-Connect service. This was either blacklist on Hikvisions end, or the actual firmware process as I downgrades.
Do not unbind your platform Hik-Connect. And be aware you may lose that option. NO MORE EVENT NOTIFICATIONS ON YOUR PHONE.
There's always
DDNS thankfully.
Option 1.
Option 2.
Option 3.
Get the firmware from an I Series product directly off a Hikvision product page.
* Do it all at your own risk! You will lose support from Annke.