Operating Manual

6-16 5100 ES Models II/III Portable Radio Operating Manual March 2008
SMARTNET / SmartZone / P25 Trunked Features
One talk group in the scan list can be designated a priority talk group by programming or it
can be the selected talk group. When scanning, messages on a non-priority talk group are
interrupted by messages on the priority talk group. Priority scanning must also be
supported at the system level for it to occur as programmed in the radio. P25 trunking
supports dual priority scan, therefore two priority talk groups can be selected.
The Control Channel handles all traffic for the radios and communicates which talk groups
are using which channels. If the radio “receives” the ID for one of its talk groups, it can go
to that channel and hear the talk group. When the radio is on the voice channel, it cannot
receive information about which talk groups are on which channel. The radio will not
know about any new talk group activity until it finishes the voice channel and returns to
the Control Channel.
If a talk group is set as a Priority Monitor talk group on the system, the system sends the
talk group’s call information over a voice channel so it can be detected and move to this
priority call. So even if the radio cannot hear the Control Channel, it will receive the call
information and switch to the channel with the priority call.
Note The Priority Monitor must not be confused with Transmit Priority, which is used when a
call is placed in Queue when all the Voice Channels are busy.
6.12 Dynamic Regrouping
The dynamic regrouping feature allows a dispatcher to change the current talk group or
switch radios to a predefined regrouping channel to receive a new talk group. When the
console issues a regroup order, the radio switches to the pre programmed regroup talk
group.
If the Cancel Dynamic Regrouping option switch or menu parameter is programmed, it
can be used to exit the dynamic regrouping mode if desired.
Otherwise, if the lock mode was not specified, the selected talk group can be manually
changed and the previous talk group is reselected. If a locked regroup command is
received, the displayed talk group cannot be changed manually or by cycling power. It can
be changed only after a clear order is received from the console.
Dynamic regrouping operates as follows:
1 When this command is received, a 765 Hz tone sounds every 25 ms for 300 ms and the
radio automatically changes to the regrouping channel. “Dyn Regrp” is displayed.
2 Talk and listen as usual. When dynamic regrouping is canceled by the dispatcher, a
short tone sounds. If a standard channel is not selected after this occurs, transmission is
not allowed if the talk group is assigned as a dynamic regrouping talk group only. If it is
assigned as a normal talk group, normal transmissions are allowed.