Local Site Trunking; Supplementary Services; Dynamic Group Number Assignment - Motorola MTP830 S Product Information Manual

56 | Services and Features
Depending on the codeplug settings, you can toggle through the interface, between high and normal RF power. That
respectively is Class 3L (1.8 W) and Class 4.
The radio can be configured to switch automatically to Class 3L (1.8 W) on entering DMO and to automatically
switch to Class 4 (1 W) on entering TMO.
Changing RF power class is performed immediately. The change can be done, for example, during a call. Such action
may result in dropping the call, as the selected power class setting can be insufficient to sustain the transmission.

Local Site Trunking

Local Site Trunking (LST) is a feature enabling a base station to operate stand-alone. The base station may enter the
mode when the link from the local cell to the central switch has gone down. The radio limits functionality when the
cell is in this mode.
Note: Whether a radio can register on cells in LST depends on the codeplug settings.
If system broadcasts indicate that system-wide services are not available (LST) on a cell, the radio registers on this
cell only if there are no system-wide cells available.
When the radio is operating on an LST cell, the radio may prevent you from invoking the following services (depends
on infrastructure settings):
• Private call
• Phone call
• PABX call
• Packet data
• SDS data
Depending on the codeplug configuration, the radio may indicate entering the LST with the following notifications:
• Visible and audible
• Visible
• Audible
• None
To avoid unnecessary roaming and reduce congestion, Local Site Trunking Ignoring feature can be enabled. When
Local Site Trunking Ignoring feature is enabled, the radio will temporarily ignore the LST/WST parameter when
selecting a site. However, the radio will still take other parameters (such as the cell's RSSI level) into consideration
when deciding on roaming.
Local Site Trunking Ignoring is a selling feature.

Supplementary Services

Following is the description of the TETRA Supplementary Services (SS) that the radio supports in the TMO.

Dynamic Group Number Assignment

The radio supports dynamic addition and removal of talkgroups in its talkgroup list through TETRA Dynamic Group
Number Assignment (DGNA) and De-assignment signaling (SS-DGNA).
The radio responds to DGNA directed to it or to DGNA directed to a group the radio is attached to.
When a dynamic group number assignment to add a new talkgroup is received, the radio adds the group in the first
available spot in the talkgroup list in the codeplug. Then you can scroll to the talkgroup to select the group. The
codeplug determines which DGNA operations are allowed for a group.
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