I recently installed a Patton SmartNode 4114 as my gateway on 3CX. I previously used to have a GrandStream but due to many issues have decided not to use it anymore. I have removed Grandstream as a PSTN device on 3CX but for some reason whenever I unplug the Grandstream or power it off, the calls don't go through. For some reason even though the Grandstream is not a PSTN device and doesn't have any active ports, it must still be plugged in to use the Patton. I know there is a small setting that I'm missing in 3CX but don't know what. Please let me know what I am missing or should I just uninstall and do a fresh install of 3CX?