Two way audio but one way call start ? possible?

i am in the process of designing a smart doorbell/intercom using the pi. inspired by hackershack yt → Smart-Doorbell/doorbell.py at master · HackerShackOfficial/Smart-Doorbell · GitHub . only difference is mine has no cam and the button trigger does not initiate the call on the pi. i want to initiate the call on my computer the other end the door bell will have audio out mic input in.Basically that end would always be on is it possible to initiate the call at just one end since my actual doorbell is not connected to the pi to trigger the call on that end on the pi.

one way to do this would be to have the doorbell autostart a meeting every time it reboots and send me a meeting link and i simply join it,something of that sort. but is there a cleaner solution