The Whisper Announcement feature is to be an expanded version of Silent Monitoring. Silent Monitoring feature allows a supervisor to monitor agent calls which are currently in progress. The supervisor microphone is switched off when Silent Monitoring feature is in use; agents and callers don't hear the supervisor. In case of Whisper Announcement activation, the supervisor will be heard by the agent and will be able to discreetly make an announcement for the agent. The agent partner will not hear supervisor's actions. He will hear only the agent. To fulfill the new requirements, the existing Silent Monitoring implementation is enhanced to switch on the supervisor microphone in order to be heard only by the agent. Whisper Announecement is a monitoring feature.