Terms you should know152programmable layers. These keys are also used to configureparameters in the Telephone Options menu.Special dial toneThe three consecutive tones followed by dial tone that you hearwhen accessing telephone features.Station Control Password (SCPW)Enables security features on your phone to prevent others frommaking calls from your telephone and to prevent access toprotected features (for example, Remote Call Forward).Status MessagesA message displayed to inform the user of important information.A right arrow appears if more than one Status Message ispresent. Examples of Status Messages include: MessageWaiting, All Lines Forwarded to: 6453, Do Not Disturb On, RingAgain active, and Ringer is OFF.System or SwitchYour office communication system.SwitchhookA button on which the handset presses down, disconnecting yourcall when you replace the handset. The handset (when lifted)releases the switchhook, and you either answer an incoming callor you receive a dial tone to make a call.User interfaceScreen displays that interact with the end user as a result of anaction or event.Visual Alerter/Message Waiting indicatorAn LCD or an LED that flashes to indicate that a message iswaiting or when the ringer is on.