67
One-touch Dial 
One-touch dialing allows you to place a call by pressing and 
holding one of the keys (1-9).
1. Press and hold the required key for a few seconds. Your 
MTM800E will display the number and dial it.
2. To hang up, press .
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 on-going private, 
phone or PABX call.
While in an on-going private, phone or PABX call, press the 
DTMF keys (0-9, *, #). When pressed, the DTMF key will 
sound a tone and the entered digit will be displayed on the 
screen.
MS-ISDN
This feature adds to the radio ISDN number. Users can 
choose between MS-ISDN and ISSI to address the call, 
send the message or pre-defined templates. It works for both 
simplex and duplex calls, based on the assigned ISDN 
number. 
Recent Calls List
Select the number from the recent call list. See “Recent 
Calls” on page 138.
Calling a Number in a Message
See “Calling a Number in a Message” on page 157.
Dialing on receiving a call
See “Dialing on Receiving a Call” on page 63.
If programmable one-touch keys are enabled, one-touch dial is 
disabled
 (see page 18).
Phone in Use
123456*#67890
Spkr
Mute