I want to try a "local" fusionpbx server onprem at the customers site, and use it as the source for the Multicast paging. Theory is they dial an extension hosted in their account, it calls to the onprem fusionpbx server , and broadcasts over a Multicast paging group with mod_efs. Question on how I would make that happen. Should I create a gateway to their hosted FusionPBX domain as the extension I want the onprem device to be called on? Would I just use the same inbound destination configuration I would use for a real DID, but just use the extension number ? Trying to displace an onprem Grandstream UC appliance with this for the PA paging functionality. I want to mimic a Sip Paging gateway with this. Any feedback is appreciated.