I want to be able to host conference calls where:
Only the host can hear everyone's audio.
All callers can send audio, but they're not getting anything back.
I've basically found out that no conference call services do this, and I'm wondering if I can roll my own and self host. I'm a web developer & don't know about how voice infrastructure works, is Asterisk what I want? Wondering if I can modify some generic conference call server boilerplate and get this "muting" behavior that I want.