I want to set up a VoIP system to allow people to remotely listen to given speeches in place.
We have a VoIP line which can receives up to 8 incoming calls. The soft will accept them with or without confirmation (we can work with a white list for example).
I tried Ekiga, but it seems not to manage multiple incoming calls. Linephone seems to be good, I succeeded to set a conference call between three SIP lines but I had to do it manually. Twinkle and Yate didn't work well (Linux Mint 17.x). I also saw pjsua, a command line soft, but not yet tested. So I need now some hints from the Internet.
PS: Allowing listeners to put their word in, for example by typing "*", would be a plus.