1.If already on a call, end the call or put it on hold (by pressing Hold).
2.Press an idle Intercom or Call Appearance button.
3.Dial the extension number or the code for the feature you wanted to access. If you put a * in front of the extension number, the system will attempt to make a direct voice call.
4.You will hear the call progress. You can continue the call handsfree or switch to using the handset by lifting it.