User's Manual

SMARTNET/SMARTZONE/P25 TRUNKED FEATURES
49
press the PTT switch and begin speaking as with a
standard call.
3. All group calls which follow are then emergency
calls (private, telephone, and call alert calls are not
allowed). If the channel is changed, the call is made
on the emergency talk group programmed for the
new channel. If the Surveillance Mode is enabled
(see Section 4.7), all indicators, lights, and tones are
disabled. If “No Receive Activity During Emer-
gency” is programmed, receive audio, the front
panel LED, and receive icons are disabled in the
receive mode.
4. To exit this mode, cycle radio power or press and
hold the Emergency switch.
6.10.4 EMERGENCY MAN-DOWN FEATURE
This feature requires a special man-down switch
(currently available only from third-party vendors)
that is attached to the accessory connector of the radio.
Then if this feature is enabled by programming and the
radio is in a horizontal position for longer than the
programmed time (0-63 seconds), an emergency
condition is triggered the same as if the Emergency
switch was pressed. The emergency can be canceled
by a press and release of the Emergency switch. Note
that accessories such as speaker-microphones cannot
be used with this feature.
6.11 FAILSOFT OPERATION
If a failure occurs in the SMARTNET/Smart-
Zone or P25 Trunked system so that it cannot be used,
the system directs the radio to automatically enter the
failsoft mode. When in this mode, “FAILSOFT” and
the alias of the selected channel are alternately
displayed. A failsoft tone may also be heard,
depending on how the repeater is programmed.
When in the failsoft mode, operation is in the
conventional mode on the preprogrammed failsoft
channel (a different failsoft channel can be
programmed on each talk group). If a transmission is
attempted before a failsoft channel is located, a contin-
uous tones sounds until the PTT switch is released.
When the radio system returns to normal operation,
this is automatically detected and normal operation
resumes.
6.12 SMARTNET/SMARTZONE/P25 TRUNKED
SCANNING FEATURES
6.12.1 GENERAL
Scanning on a SMARTNET/Smartzone and P25
Trunked systems is called Priority Monitor Scan. The
following are unique features of this type of scanning.
For general scanning information applicable to all
operating modes, refer to Sections 4.8 and 4.9.
• Scanning is turned on and off by the Scan option
switch or menu parameter. Talk groups (channels)
can be programmed so that scanning automatically
starts when the talk group is selected (Autoscan).
• 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 512 talk groups
from the same system can be programmed. The
selected scan list can be temporarily changed and
edited as described in Section 4.9.1.
• 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.