E F Johnson Company 2425M80 Benutzerhandbuch

Draft 02 - Sep 1 2015

4-22

The Emergency Alarm Rx feature allows a user to receive an Emergency Alarm display 
and/or alert on their radio when another radio on the same system sends out an 
Emergency. This feature is supported in both P25 and SmartNet/SmartZone systems. On 
SmartNet/SmartZone systems the Emergency Alarm can only be received on a radio with 
the same Talkgroup as the sending radio. On P25 systems the Emergency Alarm can be 
received by any radio on the same system.

When an Emergency Alarm is received the radio will either sound an alert tone, display 
the sending radio’s ID or Alias, or do both depending on the settings programmed. When 
received, the display context of the radio is changed to display “EA Received” on the top 
line and either the ID or the Alias of the radio who sent the Emergency Alarm. If the 
received ID is in the Call List, then the Alias will be displayed. If it is not, the ID will be 
displayed.

An Emergency Alarm will not be received when the radio is active on a voice channel, in 
Emergency, or in Radio Wide Scan Mode. Also, if in Surveillance mode, the backlight 
will not turn on when an Emergency Alarm is received.

When received, the display context of the radio is changed to display “EA Received” on 
the top line and either the ID or the Alias of the radio who sent the Emergency Alarm. If 
the received ID is in the Call List, then the Alias will be displayed. If it is not, the ID will 
be displayed.

After an Emergency Alarm has been received, any press of a button (except for the PTT) 
will exit the display and clear the ten-second timer. If no buttons are pressed, the display 
will continue to show “EA Received” along with the ID or Alias for ten seconds. 
However, the alert tone is only heard once upon receiving the alarm. There is also a timer 
that will not allow the radio to receive another Emergency Alarm from the same ID for 
twenty seconds. This timer is only cleared on a channel change, zone change, or after 
twenty seconds has expired.

Periodic PTT*

This trigger happens every time the user presses PTT. This trigger is 

activated when the user presses the PTT button but the data will 

usually be sent after the call is over. We do this to avoid delaying the 

call.

Periodic Emergency*

This trigger happens every time the user puts the radio into 

emergency.

Periodic Distance*

This trigger happens every time the user moves the radio a distance 

defined in the Triggered-Location-Request.

* Programmable in Armada.

Table 4.5 Supported Triggers