and a physical hardware USB key (dongle) for installation and operation. Official Access and Download Information To obtain the 3-SDU software
"It's building the bridge," Miller replied. "The SDU software acts as the interpreter. It takes the raw data from the fire panel—the times the doors opened, the alarm triggers, the sensor inputs—and marries it to the video feed. It proves the footage wasn't tampered with. It authenticates the chain of custody." est3 sdu software link