17System — Date & Time3.5.3 Maintenance3.5.3.1 Upgrade DP-104 FirmwareBefore you select “System” in the first level of menu and click on “Maintenance” bar in thesecond level of menu to make new configuration, you need to download the firmware file ofthe DP-104 SIP IP video door phone. Please visit http:/220.135.186.178/dp104/firmware todownload the firmware file and save in your computer.During upload the file for configuration, please keep the power supply is connect to plug-in.After the upgrade is complete, please check and confirm the firmware version has changed.System — Maintenance