The subject matter provides a method that enable detecting if a party engaged into a tele-conference call is attempting to engage into conversation while a microphone is in a mute mode. The method provides receiving of a signal. The signal is then analyzed to determining if a party is attempting to engage into conversation. If it is determined that the party is attempting to engage in the conversation then an alarm is transmitted indicating the mode of operation of the microphone. The transmitted alarm may be an audio alert or a visual alert.