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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. 

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. 

6.12.1  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.