: Firmware is typically applied via a USB flash drive through the device's Maintenance menu, though serious repairs may require an EEPROM programmer to flash the chip directly.
: Many technical experts use firmware EEPROM dumps to clear or reset forgotten administrator passwords by manually editing the memory data.
: Refers to the Hi3520D system-on-a-chip (SoC) , which is a popular processor for 4-channel and 8-channel high-definition DVRs.