Updating to the V4.x series from older V3.x versions (like V3.5.50) typically provides: Increased IP Camera Support
Note: You cannot downgrade from V4.xx to V3.xx if the bootloader was updated. ds-7232hqhi-k2 firmware
: Newer firmware often resolves limitations, allowing for more IP cameras to be added beyond the default base count. Enhanced Interface Updating to the V4