Priority call interception


I’m trying to understand how I can achieve call interception with a call already in progress. all phones are on a internal network and have no external network path to the outside.
The 20 extensions (grandstream GPX 405) are located around a machine plant with one control room.
I want the control room to intercept any call that already in progress, even hanging up the other party necessary if there is an emergency.

Can anyone help with the configuration.

Thanks in advance.