English | 11TEL MuteThe audio system automatically mutes when acall comes in.When a call comes in"CALL" is displayed.The audio system pauses.Listening to the audio during a callPress the [SRC] button.The "CALL" display disappears and the audiosystem comes back ON.When the call endsHang up the phone.The "CALL" display disappears and the audiosystem comes back ON.• To use the TEL Mute feature, you need to hook upthe MUTE wire to your telephone using a commercialtelephone accessory. Refer to Terminals> (page 27).Theft Deterrent FaceplateThe faceplate of the unit can be detached andtaken with you, helping to deter theft.Removing the FaceplatePress the Release button.The faceplate unlocks, allowing you to detach it.• The faceplate is a precision piece of equipment andcan be damaged by shocks or jolts.• Keep the faceplate in its faceplate case whiledetached.• Do not expose the faceplate (and the faceplate case)to direct sunlight or excessive heat or humidity. Alsoavoid places with too much dust or the possibility ofwater splashing.Reattaching the Faceplate1 Align the projections on the unit with thegrooves on the faceplate.ProjectionsGrooves2 Push the faceplate in until it clicks.The faceplate is locked in place, allowing you touse the unit.Dimmer ControlYou can lower the brightness of the display byusing the dimmer function.Press the [DIM] button for at least 1 second.Each time you press the button for 1 second, theDimmer contol turns ON or OFF.When the Dimmer control is ON, "DIM ON" isdisplayed.