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Pressing the Emergency button during an ongoing emergency broadcast call has no effect. No new
call is started and no emergency alert is sent.
When the Emergency Group Call you participate in terminates, your radio can behave in several ways,
depending on your service provider settings:
•
If you are the call initiator, the radio can either stay in the Emergency Mode, or return to TMO.
•
If you are not the call initiator, the radio always returns to TMO.
3.5.2.1
Making Emergency Group Calls
Prerequisites:Ensure that your radio is in Emergency Mode.
Procedure:
1 Press and hold the PTT button.
2 Wait for the talk permit tone (if configured) and talk.
3 Release the PTT button to listen.
NOTICE: It is possible to cancel making an emergency group call in TMO. To do this,
perform one of the following actions before the talk permit is granted (depending on your
service provider settings):
•
Release the PTT button.
•
Press the End key (default).
When the call is canceled, your radio displays Call Cancelled message (if configured
by your service provider).
NOTICE: It is possible to cancel making an emergency group call in TMO. To do this,
press the Back key.
3.5.2.2
Receiving Emergency Group Calls
The radio receives an Emergency Group Call from a selected pre-programmed group. An appropriate
tone, status icon, and red color of the display indicates an incoming call.
The radio receives an Emergency Group Call from a selected pre-programmed group. An appropriate
tone and status icon indicates an incoming call.
3.5.3
Non-Tactical Emergency
In Non-Tactical Emergency, the radio switches to a designated Emergency talkgroup when starting
Emergency Operations. This talkgroup is used for the complete duration of the Emergency Operation.
Changing talkgroups is not allowed at this point.
In Trunked Mode Operation (TMO), the radio can make Emergency Non-Tactical Group Calls without
sending attachments. If configured, the radio assumes implicit attachments after receiving a temporary
address.
In Direct Mode Operation (DMO), the Non-Tactical Emergency proceeds on the same frequency as the
previously selected talkgroup. The service provider can designate any Individual TETRA Subscriber
Identity (ITSI) address to be used for Emergency Operations. This ITSI can be an Open Group -
broadcast address.
After exiting from Non-Tactical Emergency, the radio returns to the previously selected talkgroup.
MN004519A01-AK
Chapter 3: Modes
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