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•
When responding to calls in the scan mode, the
programming of the Talkback Scan parameter deter-
mines if a response always occurs on the talk group
of the call (Active Group) or the Selected Group if
they are different. Transmissions at other times
always occur on the selected talk group.
•
Each talk group can be programmed to select one of
the programmed scan lists or "No List" (scanning is
disabled). If scanning is enabled and the selected
channel does not permit scanning, it is automatically
enabled again when a channel is selected that
permits scanning.
•
Up to 256 scan lists, each with up to 256 talk groups
from the same system can be programmed. The
selected scan list can be temporarily changed as
described in Section 4.9.4 and edited as described in
Section 4.9.5.
•
In addition to calls on channels in the scan list,
pages, private/unit calls, and telephone* calls are
received while scanning. Private and telephone calls
are not interrupted by priority messages.
6.12.2 PRIORITY TALK GROUP SAMPLING
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.
6.13 DYNAMIC REGROUPING
The dynamic regrouping feature allows a
dispatcher to change the current talk group or switch
mobiles to a predefined regrouping channel to receive
an important message. When the console issues a
regroup order, the transceiver switches to the prepro-
grammed regroup talk group. If the lock mode was not
specified, the selected talk group can be manually
changed and the previous talk group is reselected if
power is cycled. 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:
*
Telephone calling is currently not available.
SMARTNET/SMARTZONE/P25 TRUNKED FEATURES
1. When this command is received, alternating tones
sound and the transceiver automatically changes to
the regrouping channel and "DYN REGRP" is
displayed.
2. Manually select the channel corresponding to that
alias. If this is not done, transmission still occurs on
the new channel, but the alternating tones sound
each time the PTT switch is pressed.
3. Talk and listen as usual. The dispatcher cancels
dynamic regrouping which is indicated by a short
tone. 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 trans-
missions are allowed.
6.14 SMARTZONE AND P25 TRUNKED
UNIQUE FEATURES
6.14.1 INTRODUCTION
As described in Section 3.8.3, the SmartZone
mode provides wide area coverage by allowing
roaming between SMARTNET and conventional sites.
The P25 Trunked mode can provide access to a single
trunked site or roaming between several trunked sites.
Operation in these modes is the same as just described
in the preceding sections (6.1-6.13) with the following
additional features:
6.14.2 BUSY OVERRIDE
The busy override feature is enabled at the system
level by the system manager and is not a program-
mable radio feature. It allows a call to be placed even
if not all sites you are calling have a free traffic
channel. The only sites guaranteed to be included are
the Critical Sites and the sites where a Critical User is
located. This feature operates as follows:
1. Assume that you have attempted to place a call and
the system was busy ("BUSY" displayed and busy
tone sounded).
2. Release the PTT switch and then press it for 5
seconds or more. If a chirp tone sounds with the PTT
switch pressed, busy override is occurring.
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