Ahh got it. So my next question would be how do I get those Hikvision trunks to ring phones without a ring group?
Add 1 indoor station Trunk extension per FreePBX extension?
1 trunk is enough as extension.. I used conference, you can invite as many extensions to the call, once you join, the ,8003 joins too...
I used that approach so I can originate the call from an custom app (rtsp for asterisk,) to have early video