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English
Function Keys
Side Keys
The Rotary knob and Side key programming are paired:
When the Rotary knob is programmed to volume control or dual 
control, the Side keys support the one-touch feature that allows you 
to select or activate commonly used features by pressing and 
holding a single key. By default, the upper Side key is set to 
“Backlight On/Off” and the lower Side key is set to “Screen Saver 
On”. Please check with your Service Provider.
Numeric, 
 and   Keys
The MTH800 supports the one-touch feature that allows you to 
select or activate commonly used features by pressing and holding 
an assigned key. 
One Touch Private Call
The MTH800 supports the one-touch private call if it is set by the 
Service Provider. User can dial the last group call originator number 
via pressing the assigned button. 
For information on the function assigned to each Side, Numeric, 
 or   keys, please refer to your Service Provider.
The required time you need to press the Side, Numeric, 
 or 
 keys to activate a one-touch function is set as default to 1 
second. This time may be set, however, by your Service Provider.
Rotary Knob Programming Side Key Programming
Dual control
Programmed to a one-touch 
function
List control
: Volume Up
: Volume Down
Volume control
Programmed to a one-touch 
function