Hy there i can see your post and i must say
Call Groups or Hunt Groups:
Some phone systems allow you to set up call groups or hunt groups. In this setup, you can create a group of multiple devices (mobile phones, SIP devices) that will all ring simultaneously when a call comes in. If your system supports this feature, it can help you distribute calls to more than 4 devices.
My ADP WorkforceVoIP Service Providers:
Depending on the VoIP service provider you're using, there might be advanced call routing or forwarding features available. Check with your provider to see if they offer solutions that allow for calls to be forwarded to multiple devices.
Thanks and regards
MildredShapiro