46 CHAPTER 4: BASIC T ELEPHONE OPERATIONTo activate Do Not Disturb:1 Press the Do Not Disturb Access button on the telephone. The red lightis lit next to the Do Not Disturb button.Your telephone is now in Do Not Disturb mode. The display panel showsDND.2 To disable Do Not Disturb mode, repeat step 1. The DND messagedisappears from the display panel and the red light goes out.ActivatingMalicious Call TraceThe Malicious Call Trace feature enables you to notify the system if youreceive a harassing or abusive call. The calling party can be from either anexternal or internal source.Malicious Call Trace cannot be invoked when you are on a conferencecall.To activate malicious call tracing during a call, press Feature + 119.The Display Panel shows malicious call for 5 seconds.The results of tracing a malicious call include the following actions:■ Notification is sent to your network manager.■ The log for the call includes a malicious call identifier.■ For external malicious calls, the VCX system sends a message to theauthorities configured by your administrator to receive these reports.Once you use the Malicious Call Trace feature code during a call, youcannot revoke it.