Draft 02 - Sep 1 2015
5-8
Viking Mobile Radio Operating Manual
Conventional Mode Features
This feature is available on conventional channels only.
5.9
Emergency Alarm and Call
Emergency Alarms and Calls are separate functions that can be individually enabled or
disabled on each analog and P25 conventional system. The Emergency option switch (or
menu selection) is required for these functions. Emergency Alarms and Calls are
transmitted on the global (radio wide) emergency zone/channel if one is programmed and
a smart console with message receiving capabilities is used. If it is not programmed, the
emergency is transmitted on the selected channel. The emergency programming of the
system to which that channel is linked controls the emergency operation.
The user can set an external line by pressing the emergency button. External devices can
trigger off of the radio’s external line. If the “Ext Emergency” Option is enabled by
programming and the user presses the emergency button, the Aux B line on the accessory
connect shall be set to low (0V). It remains low until the External Emergency Time has
passed or the user exits the emergency. If the user presses emergency during the External
Emergency Time, the timer starts over. If the user exits emergency before the External
Emergency Time has passed, the output line returns to Vbatt.
5.9.1
Emergency Alarms
An emergency alarm is a special transmission that alerts a dispatcher of an emergency
situation. It is sent automatically by pressing Emergency option switch. The system to
which the emergency channel is linked must have Emergency Alarms enabled. If it does
not, Emergency Alarms are disabled. Emergency alarms and calls can be received on
smart consoles with message receiving capabilities.
In the P25 conventional mode, a special P25 emergency data transmission is sent, and in
the conventional analog mode, an DTMF emergency ID is sent. Refer to Section 5.12.5 for
information on the MDC1200 Emergency Alert.
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 Emergency 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 “EMERGENCY” flashes in the display.
This indication continues to flash until the alarm mode is ended (see Step 4).
