Motorola MTP850 Ex Product Information Manual page 181

DMO Parameters
19.3 DMO Group Call Timers
19.3.1 DMO Reservation Time
Specifies the length of channel reservation for DMO calls in calls that the terminal initiates. During
the reservation time other terminals that want to talk do not need to set up a new reservation.
Instead, the current channel reservation may be used until the end of the timeout.
Related field:
This field is only available if the DMO Reservation feature is enabled, refer to Paragraph 14.7 "Direct
Mode (DMO) Reservation".
19.3.2 DT211_R
Maximum time to wait for response to a single random access attempt in a call via repeater.
The range for this timer is 5 - 7 seconds.
The default is 7 seconds.
19.3.3 DT225
Inactivity time-out on the link from DM repeater for the Master DM MS in circuit mode call.
The range for this timer is 54 - 180 seconds.
The default is 90 seconds.
19.4 DMO Group Call Constants
Information on Random Access Messages
During the occupation and reservation periods, another DM-MS that wishes to transmit traffic or
short data must first request and be granted permission by the current master before performing a
set-up procedure and becoming master of the channel itself.
The DM-MS requests permission by sending the pre-emption or change over message. Since more
than one DM-MS may be attempting to request use of the channel, a random access protocol is
March 2009 Chapter 3 - MTP850 Ex/MTP810 Ex Product Information Manual
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