Raspberry PI SBC's are very useful when you have a cloud based 3CX system, it is recommended that you have one for every location that needs to connect desk phones to it.
Hosted 3CX Server If you have a 3CX server hosted with us, you just need to make sure that your devices are able to communicate with that server. 3CX Clients and Session Border Controllers use a combination of HTTPS (default port TCP 443/5001) and ...