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32 | Services and Features
Note: It is possible to power up the radio by pressing the Emergency Button. Depending on the service
provider settings the radio can start Emergency Operations automatically. If the radio was PIN-protected
(except SIM PIN), Emergency Operations will bypass the PIN lock for the duration of the Emergency
Operations.
During Emergency Operations, the radio automatically rejects phone, PABX and private calls, and does not monitor
the talkgroups in the selected scan list. However, if an ATG is the selected group, the radio monitors the sub-groups
associated with the ATG.
When entering Emergency Operation, any ongoing voice call is aborted or cleared down. Any packet data transfer in
progress is aborted. However, the session is kept open.
Emergency Group Call
The Emergency Group Call has the highest communication priority that means it is the pre-emptive call. Emergency
Group Call is available in both TMO and DMO modes. During Emergency Operations, Emergency Group Call can be
started by pressing PTT. The MS may also support Hot Microphone operation, which allows the Emergency Call to
be conducted without pressing PTT.
If a radio receives an incoming group call with emergency priority, the display shows that an emergency call has been
received, and a special audio alert is played.
An emergency group call can be configured as non-tactical or tactical:
•
A non-tactical call is initiated on a talkgroup designated by the codeplug setting. When in non-tactical emergency
mode, you cannot switch talkgroups.
•
A tactical call is initiated on the currently selected talkgroup
In TMO, if the radio enters emergency operations while the emergency broadcast call is active the radio continues on
the call without initiating any calls and sends an emergency alarm.
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 Operations (you cannot change the
talkgroup).
In TMO, it is possible to configure the radio to make Emergency Non-Tactical Group Calls without sending
attachment. If this is set, the radio assumes implicit attachment after receiving a temporary address.
In DMO, the Non-Tactical Emergency proceeds on the same frequency as the previously selected talkgroup. The
service provider can designate any ITSI address to be used for Emergency Operations, (this can be an Open Group –
broadcast address).
After exiting from Non-Tactical Emergency, the radio goes back to the previously selected talkgroup.
Emergency Alarm
The emergency alarm is a special status message sent to the infrastructure while starting the Emergency Operations.
The radio may wait for infrastructure acknowledgment for this alarm and attempts retries.
Each time the radio enters the Emergency operation, it sends an emergency alarm. When an emergency alarm is sent
successfully, the respective audible tone sounds.
In addition, once the radio is in the Emergency Operation on pressing the EMERGENCY button, an additional
emergency alarm is sent. (Exception: during Hot Microphone transmission).
The message can be dispatched both in TMO and DMO.
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