The IC-306 release the audio alarm and flashes the lamp in its (ALARM RESET) button when a telex or e-mail is received. To silence the audio alarm in this case, press the (ALARM RESET) button on the IC-306. In addition to telex or e-mail notification, the audio alarm sounds and the lamp flashes also for the equipment trouble listed below. To acknowledge this alarm, press the (ALARM RESET) button, and the alarm tone changes. To silent the alarm and flashing of the button in case of external equipment abnormality, press the (F10) key on keyboard.