I’ve got a school that wants to stop a multicast page when another one starts. The scenario is they’re playing a recorded lockdown page but the situation escalated rapidly and instead of waiting for the long lockdown message to finish (up to 80 seconds - message repeats several times to make sure it is heard in loud classrooms, gyms, playgrounds, etc.) they urgently need to play an intruder message.
Well, I’m going to guess you’ll need to call the active call source from the PBX. I haven’t done multicast in a long time but from what I recall, you need to kill it at the source. So if this was straight from the phone, the initiator of the page would have to end the call. Since this is coming from the PBX, you’ll need to kill the channel that started the page.