OK, then here are some links around this idea: https://robocall.devpost.com/forum_topics/1748-small-asterisk-based-device https://robocall.devpost.com/forum_to

OK, then here are some links around this idea: https://robocall.devpost.com/forum_topics/1748-small-asterisk-based-device https://robocall.devpost.com/forum_topics/1748-small-asteris... https://www.wrbishop.com/telecom/end-robocaller-solicitation-and-hangup-calls-with-asterisk/ https://www.wrbishop.com/telecom/end-robocaller-solicitation... https://www.raspberrypi.org/forums/viewtopic.php?t=172926 https://www.raspberrypi.org/forums/viewtopic.php?t=172926 http://nerdvittles.com/?p=15412To http://nerdvittles.com/?p=15412To Good luck !