Emergency Group Call - Motorola MTP8500Ex User Manual

MN002033A01–AC (en-US)
Chapter 3: Modes
3.5.2

Emergency Group Call

The Emergency Group Call has the highest communication priority and it is a pre-emptive call.
Emergency Group Call is available in both TMO and DMO. During Emergency Operations, start
Emergency Group Call by pressing the Emergency button. The radio can also support Hot
Microphone operation, which allows the Emergency Call to be conducted without pressing the PTT
button.
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.
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