Receiving an Alarm call
An Alarm call overrides any existing calls on the talkgroup.
You know you are receiving an Alarm call when:
your radio sounds an audible tone
the LED flashes red
the emergency symbol appears on the screen
your radio status changes to Emergency
Clearing an Alarm call
You can only clear an Alarm call that you have initiated.
To cancel the Alarm call, press the Call Clear key, the Clear context key or
the Cancel/Home key. Alternatively, press and hold the Emergency button (2
seconds).
Warning: Depending on which network is being used, if the TETRA
Alarm call is a group call, then although both of the TETRA Alarm call
exit functions will clear the TETRA Alarm call on the call originator’s
radio, it will not remove the alarm from the system. It should also be
noted that those radios alerted to the emergency may, depending
upon the infrastructure configuration, remain in the TETRA Alarm call
condition until the dispatcher clears the call from the system.
When the Alarm call is cancelled, your radio returns to the talkgroup that
was selected before the call was initiated.
Power on Alarm call
If your radio is powered off, press and hold (3 seconds) the Emergency
button to power on and initiate an Alarm call. Any customised Welcome
screen is not displayed during power on. If your radio is customised for PIN
entry, you will need to enter your PIN before the alarm call is initiated. It may
take several seconds for the radio to complete its power on process before
initiating the Alarm call.
User Guide
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