we are using 3CX v9 SP 5 and Yealink T28 and we have the following problem: Wenn we miss a call in the directory is just our own DN not the external number of the caller?
Do you use a gateway or VoIP provider (which provider)? Some gateways can be set-up to send additional information. Do you have 3CX set up to send the name of the ringgroup to the sets?