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DTMF Overdial 
If set up by your Service Provider, DTMF allows you to 
communicate with an automated answering device (for 
example, the voice mail or answering machine) during an 
ongoing call.
While in an ongoing call, press the keys 
0 to 9, *, #. When pressed, the key will 
sound a tone and the entered digit will be 
displayed on the screen.
Dialling on receiving a call
See “Dialling on Receiving a Call” on page 56.
Answering a Phone or PABX Call
1. The MTM800 automatically switches to Phone Mode and 
starts ringing.
2. To answer the incoming call, press   or any key (except 
Power On/Off).
3. To end or cancel the call, press 
End. The display returns 
automatically to the mode it was before the incoming call 
arrived. 
If the called person ends the call, the 
Call Ended message is 
displayed. 
 
For call alert, see settings in the Tones menu option (page 88).
Phone In Use
12345*#67890
6815321H01_KOR.book  Page 60  Thursday, November 13, 2008  8:06 AM