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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 into the
rotary position 9 or 10 of the Favorite Talkgroup list. The radio assigns the newest received group to the rotary
position containing the oldest assigned group. If any of the previously assigned groups has been deassigned and an
additional DGNA group is received, the radio assigns the newest received group to the smallest free rotary valid
position (that is position 9 or 10).
You can then scroll to the talkgroup to select the group. The groups are assigned as not attached and they are attached
once selected using the rotary knob.
If the selected talkgroup is de-assigned, the group that was programmed on that rotary position is restored.
The radio supports the reception of a DGNA Assignment that is addressed to its selected talkgroup as a supergroup of
the selected group. All signaling addressed to the supergroup is monitored in addition to signaling addressed to the
selected group, any announcement or associated groups, and groups in the active scan lists.
When the selected group is unselected, the radio ceases processing signaling to the supergroup that was associated
with that selected group.
The radio receives the lifetime of the supergroup as part of the assignment signaling. If a subsequent assignment to
the same group is not received within that lifetime, the radio ceases monitoring that supergroup.
The radio also supports supergroups of scanned groups, such that a group addressed DGNA assignment received on
one of the user scan group addresses causes the radio to monitor all signaling addressed to that supergroup as long as
the scan group is being monitored, and as long as the supergroup lifetime lasts.
The following DGNA functionalities are not supported:
Services and Features | 43
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