For correct operation, the Fanvil i53W must be running at least firmware version 2.12.34.
Download firmware version 2.12.34 (unzip the ZIP file before installing):
i53w-fanvil-release-4908-2.12.34-krnvlT2023-05-08-12.13.39Download
Open the Fanvil web interface and log in.
Then go to Line > SIP > SIP Global Settings and disable Enable Strict UA Match (uncheck it), then press Apply.

Then, under Line > SIP > Video Codecs, select the H264 codec and confirm with Apply.

Under Line > Advanced Settings, Enable Preview should be enabled and Preview Mode set to Preview18x.

Under SIP Telephony > Call Settings, enable Enable Early Media. Leave the hostname under Direct IP Calls set to auto and select UDP as the protocol.

In the ESENTA SIAS web interface, under Doorbell Nameplates, you can now create a doorbell nameplate with a call target in the form sip:[IP of Fanvil i53W]:

When the doorbell button is pressed on the ESENTA SIAS display, the i53W should now ring and show the video image.
First, copy the H264 RTSP stream to the clipboard from the Camera > Streams subpage in the SIAS web interface:

If ESENTA SIAS and the Fanvil i53W are on different subnets, "Rtsp Client Work Mode" must be enabled on the Fanvil i53W.
To do so, open the System > Configurations page
rtsp.txtDownload configuration file

Now, in the Fanvil web interface, go to the Function Key subpage and follow these steps:

Now, pressing the physical camera button on the i53W will show the camera image from ESENTA SIAS.
To trigger the door opener, ESENTA SIAS's HTTP relay interface can be used.
Proceed as follows:

Now, in the Fanvil web interface, go to the Function Key subpage and follow these steps:

Now, pressing the physical key button on the i53W will switch the corresponding relay, i.e. the door opener, via ESENTA SIAS.
