Ds7616nik2 Firmware Link Access
: Ensure the downloaded file is a .dav file (usually named digicap.dav ) before attempting to upload it via USB or the web interface. Firmware - Download - Hikvision South Asia
The real link wasn't a URL. It was a process. It was soldering a serial-to-USB adapter to the debug header on the motherboard. It was watching hex scroll by in PuTTY at 115200 baud.