M2016S Secure Set Page 107 of 504Telephones and Consoles Description, Installation, and Operationadjustments are made. If the telephone is equipped with a Display Module,volume can be adjusted at any time with the setting displayed on the screen(in Program mode).Handset volumes can be configured to return to nominal on a per call basis.You can adjust the volume of the following tones, while they are audible:• ringing• handset/headset• buzz• on-hook dialingWhen the telephone is disconnected, all volume levels will return to defaultvalues upon reconnection.Message Waiting lampThe telephone has a red triangle in the upper right-hand corner that lightsbrightly to indicate a message is waiting. This LED is the primary messagewaiting indicator and lets you know a message is waiting regardless ofwhether the telephone has a message waiting key/lamp pair. You must haveMessage Waiting CCOS configured.If you do assign a message waiting key/lamp pair, there will be twoindications of a message waiting:• the red Message Waiting triangle blinks, and• the LCD associated with the Message Waiting key flashes.You may assign an Autodial key that dials the message center (or voice mailsystem) to avoid the double indication, or have no key/lamp pair assigned tothe message center.The Message Waiting lamp is also used to indicate security of the M2016S.The red LED triangle lights steadily when the phone is not secure (handset isoff-hook, phone is ringing or any time the handset/piezo relays areconnected). The red LED triangle blinks when a message is waiting.