DMO Parameters 3-73
September 2008
Chapter 3 - MTM800 Product Information Manual 6866537D87-F
19.3.3 DT309
The entry in this field defines the time in seconds that the terminal will wait, after receiving a
DM_GACK, for a Gateway Transmit Accept (DM-GTXACCEPT) message before timing out.
The range for this timer is 5- 30 seconds. The default is 5 seconds.
19.3.4 DT308, Pre-emption via Gateway Timer
The entry in this field defines the time in seconds that the terminal will wait, after receiving a
DM_GACK, for a Gateway Pre-emption Accept message (DM-GPRE ACCEPT) before timing out.
Pre-requisite for this option is that “Initiate pre-emption in ongoing call” is supported by the terminal.
The range for this timer is 10 - 60 seconds.
The default is 30 seconds.
Note: Selecting the reset option for each of the above timers will enter the factory default setting in
the Field Value box.
19.4 DMO Address Extension
The 2 entries in this sub menu are used to identify the DMO Gateway on which the terminal can
operate. As an example, adjacent regional police forces have their own separate Tetra systems and
are using Gateways. By having the same entries for these fields in all the gateways, subscribers
from both systems are then able to communicate with each other.
19.4.1 MCC
The entry in this field defines the country code for the country in which the gateway is operating.
19.4.2 MNC
The entry in this field defines the system operating (licence number) number obtained from the in
country licensing authority.
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