Alpha1,
We are new here. Please ignore this if you have found your answers.
Our good friend, communicates with her dad with the "drop in" feature. Both ends need wifi.
She first enable the "drop in" command. Then just say "drop in on Dad" and it turns on a video call (if you have an Alexa with video). Dad doesn't have to answer.
My friend has an Alexa app on her phone so she can use that to "drop in" on her Alexa even if she's not at home with her Alexa.