27
Getting Started
Exiting Local Area Service
When the link with the central network controller is re-
established, the MTM800 exits Local Area Service and the 
following occurs:
• the MTM800 sounds a tone.
• any call in progress during Local Area Service is dropped.
Dimming the Display
If the backlight is set to Manual (see “Setting Backlight” on 
page 85), there are four levels of display backlight intensity. 
To change the backlight intensity, press  . 
Adjusting the Volume
To increase the volume, turn the On/Off-Volume knob 
clockwise.
To decrease the volume, turn the On/Off-Volume knob 
counter-clockwise. 
Horn & Lights Alarm On/Off
Use the Horn & Lights Alarm when you leave your car and 
want to be alerted if an important message arrives (Private 
Call, for example).
 
If the External Alarm function is pre-programmed, the car 
lights turn on and an alarm sounds to inform you of the 
incoming call.
The intensity cannot be dimmed in Phone or PABX Mode and 
text editing, where the Backlight key 
 is used to enter a # 
sign and/or as a Shift key.
In order to operate the Horn & Lights Alarm, you must install the 
GKN6272 accessory in your vehicle.
6815321H01_KOR.book  Page 27  Thursday, November 13, 2008  8:06 AM