Videocall by Panasonic KH-HDV430 through Yeastar S20

I've installed Yeastar S20 and cant make video call by my Panasonic KH-HDV430.

Codec H.264 is installed on S20

Panasonic KH-HDV430 uses H.264 too.

Other device is Beward DS03MP intercom and it uses H.264 too.

Grandstream and Yeastar phones make videocalls correctly.

Panasonic makes only audio call, showing black screen.

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