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DMO Group Call
DMO Group Call
General
In DMO, the MTM800 Enhanced can be used without your 
Service Provider’s infrastructure.
Direct Mode allows communication with other terminals also 
operating in Direct Mode, which are on the same frequency 
and talkgroup as your MTM800 Enhanced.
You can receive a call:
• From the selected talkgroup
• From other users within talkback range (if configured by 
your Service Provider). This is called an InterMNI (Mobile 
Network identity) call.
• From an open group. (An open group is a super-group to 
which all DMO groups belong.)
When you start a call, the members of the selected talkgroup 
who have their units turned on, and are within the group 
subscriber identity (as configured by the Service Provider), 
will receive the transmission.
In DMO the MTM800 Enhanced can communicate with the 
trunking system (and vice-versa) if the Gateway option is 
enabled in the MTM800 Enhanced.
To enhance the terminal’s DMO coverage area the DMO 
group can link to a repeater if the Repeater option is enabled 
in the terminal. Additionally the GW + Rep (gateway and 
repeater) communication mode can be used. 
If Transmit Inhibit is activated while the terminal is set to 
DMO, the PTT is disabled. You can only listen. For detailed 
information on Transmit Inhibit, see page 41. DMO Talkgroup 
selection is allowed when Transmit Inhibit is activated. 
In DMO it is only possible to place Group Calls, Emergency 
Group Calls and Private Half-duplex Calls.