Door phones' system settings can be either accessed on the device or on its interface.
Access the Device Settings
To access the device settings, you can long-press on the initial screen for approximately five seconds, then enter the default PIN code Admin321. and press Confirm.

Note
The default PIN is admin for E18 with the firmware version 18.30.10.211 or lower.
Access the Device Web Settings
You can enter the device IP address in a browser and log into the device web interface where you can configure and adjust parameters.
Check the device IP on the Setting > System Info screen or use the Akuvox IP scanner tool to search for the device's IP address in the same LAN.

Note
Download IP scanner:
https://knowledge.akuvox.com/docs/akuvox-ip-scanner?highlight=IPSee the detailed guide:
https://knowledge.akuvox.com/v1/docs/en/how-to-obtain-ip-address-via-ip-scanner?highlight=IP%20ScannerGoogle Chrome browser is strongly recommended.
The initial username and password are both admin.
Your computer should be on the same network as the device.