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6.10.1  INTRODUCTION

Emergency Alarms and Calls are separate func-

tions that can be individually enabled or disabled on 
each SMARTNET/SmartZone and P25 Trunked 
system. The Emergency option switch is required for 
these functions. Other emergency features are as 
follows:

•

Emergency Alarms are transmitted on the selected 
talk group if emergency calls are disabled, and on 
the emergency talk group if emergency calls are 
enabled.

•

Emergency Call talk group selection priority is as 
follows. For example, if a global emergency channel 
is not programmed, the emergency talk group of the 
selected channel is used and so on.

1. Global (radio wide) emergency channel
2. Emergency group of the selected channel
3. Talk group of the selected channel
4. Announcement group of the selected channel

•

The emergency programming of the system to 
which that emergency talk group is linked controls 
the emergency operation.

6.10.2  EMERGENCY ALARMS

An emergency alarm is a special transmission that 

alerts a dispatcher of an emergency situation. It is sent 
automatically by simply pressing Emergency option 
switch. The system to which the emergency channel is 
linked must have Emergency Alarms enabled. If not, 
Emergency Alarms are disabled. The alarm is sent on 
the control channel using Motorola proprietary 
signaling.

Proceed as follows to send an emergency alarm: 

1. If required, select a channel of a system on which 

Emergency Alarms are enabled and then press the 

EMER option switch. The radio then automatically 
transmits the emergency alarm.

2. Either Normal or Silent operation can be 

programmed. With the Normal mode, the red LED 
lights, the emergency tone sounds, and 
“EMERGNCY” flashes in the display. This indica-
tion continues to flash until the alarm mode is ended 
(see step 4). If silent programmed or the Surveil-
lance mode is selected (see Section 4.9), none of 
these indications occur. 

3. When the emergency alarm is acknowledged, “ACK 

RCVD” is briefly displayed and the emergency 
acknowledge tone (two beeps) sounds. Silent opera-
tion may also be programmed in which case no tone 
sounds and there is no indication that an acknowl-
edgment occurred.

4. The radio continues to transmit this message until an 

acknowledgment is received or the programmed 
number of attempts have been made. The emer-
gency alarm mode is exited when radio power is 
cycled, the channel is changed, or by pressing and 
holding* the Emergency option switch. 

6.10.3  EMERGENCY CALLS

General

An emergency call urgently requests access to a 

voice channel (an emergency tone usually does not 
sound at the console). An emergency call is placed by 
pressing the PTT switch after pressing the Emergency 
option button. If the Emergency Hot Mic feature is 
enabled, the emergency call is automatically trans-
mitted without having to press the PTT switch (see 
following description). The system to which the emer-
gency channel is linked must have Emergency Calls 
enabled.

Emergency Hot Mic

If Emergency Hot Mic has been enabled for 

emergency calls, automatic transmitting occurs with 
microphone audio unmuted without having to manu-
ally press the PTT switch. The automatic transmit 
period is programmed for 10-120 seconds in 10-
second intervals. If this feature or emergency calls are 
not enabled by programming, automatic transmitting 

* This feature requires firmware 1.24.1/2.2.1/3.2.1 or 
later and PCConfigure 1.22.0 or later.