When a radio receives or generates a group call with emergency priority, the display changes color to
red and a red triangle icon is displayed. A special
alert
tone is played.
An emergency group call can be configured as:
• A non-tactical call – initiated on a talkgroup preprogrammed by your service provider. When in non-
tactical emergency mode, you cannot switch talkgroups.
• A tactical call – initiated on the currently selected talkgroup.
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).
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.
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.
68015000797-EH
Chapter 3: Modes
55
