Is it possible to hit zero in someone's voicemail to return you to the operator?

[RDWild]

Or to your main digital receptionist?

 

[SweetAction]

Or to your main digital receptionist?

*, not 0. Not changeable.

That will send you to the receptionist defined in Settings -> General

 

[TheodorosG_3CX]

Just to clarify the * is the default DTMF value to contact operator and cannot be changed.