We have an end-user that has some video door intercoms, some wall-mounted SIP screens to answer the door, and some video capable Yealink phones.
When the door button is pressed, all devices ring, but only the wall-mounted SIP screen display a preview of the door video before the call is answered. (Video data sent via the Asterisk server, not direct IP)
The Yealink phones show a blank screen as if they are aware that a video call is coming (due to the codecs advertised?), but they don’t display the video until the call is answered/established.
Is there any way to force Asterisk to start sending early media before the call is answered?
I don’t see an Early Media setting in the latest Yealink firmware so I’m guessing that the phones automatically use Early Media if sent by the server?
Many thanks
Dan