Getting Started
 11
Powering On/Off (On-Off/End/Home Key)
To power On, press and hold . Your  MTH800 performs a self-
check and registration routine. After successful registration, the  
MTH800 is in service.
To power Off, press and hold . You will hear a beep and the 
Powering Off message is displayed.
16 Soft Key(s)
Press to select the option that appears in the display 
directly above the left or right soft key
.
17  Programmable Side Keys 1 and 2
Default programming: upper Side key activates/deactivates 
Backlight; lower Side key activates Screen Saver.
(See also No. 19)
18 Push-To-Talk Button (PTT)
Press and hold this side button to talk in half-duplex calls, 
release it to listen.
Press to send status and text messages.
19 Earpiece
20 Programmable Rotary Knob
Default programming: “Dual” - Press the knob to toggle 
between “volume” and “list”. Side keys (No. 17) operate as 
programmed.
21  Programmable Emergency Button (on top of the MTH800)
Press and hold to enter Emergency mode, and send 
Emergency Alarms (as programmed). Press and hold to 
start an Emergency Private Call (half-duplex or full-duplex).
When the MTH800 is Off, press and hold to power on in 
Emergency Operation or in standard mode (as 
programmed).
Before using your MTH800 for the first time, remove the plastic 
lens protector from the display, and charge battery overnight to 
ensure battery is initialised to it’s full capacity.
 Number Description
6802972C35.book  Page 11  Monday, August 16, 2004  9:22 PM