2 diff call volumes for internal vs external calls

[ElementalWindX]

Is it possible to set fanvil phones to where internal calls are audible but external calls are silent? Using the newest 3cx.

 

[NickD_3CX]

I am not sure about the use-case here, you either want to accept calls or not.
If you don't want to get bothered by External Callers at some point, you can send External Callers to your VMail or another extension: