E F Johnson Company 2425770 사용자 설명서

Viking Portable 600 Radio Operating Manual

5-9

In the P25 conventional mode, a special P25 emergency data transmission is sent, and in 
the conventional analog mode, an analog signalling packet is sent (both are programmed). 
Refer to Section 5.12.3, "MDC1200 Compatibility" for information on MDC1200 
Emergency Alert.

For an Emergency Alarm:

• The DTMF Emergency ID is sent.

• The MDC ID is sent with the emergency bit set.

• The Five Tone ID is sent with the fifth tone being status type emergency.

• GE Star ANI is sent.

• Two Tone Encoder is sent.

• No special action is done with the single tone.

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 button or select that menu parameter. The radio then 
automatically transmits the emergency alarm.

2 Either Normal or Silent operation can be programmed. With Normal operation, the red 

LED lights, the emergency tone sounds, and “EMERGENCY” flashes in the display. 
“EMERGENCY” continues to flash until the alarm ends. If “Silent” is programmed, 
none of these indications occur. If “No Receive Activity During Emergency” is 
programmed, receive audio, the front panel LED, and receive icons are disabled in the 
receive mode.

3 When the emergency alarm is acknowledged by the dispatcher, “Ack Rcvd” is briefly 

displayed and the emergency acknowledge tone (two beeps) sounds. This alert tone can 
be disabled if desired, and does not occur if Silent operation is programmed. 

Retries will occur automatically for conventional analog and MDC. No emergency 
acknowledgement is expected from the system. Retries will continue until a 
programmed count of retries is reached.

4 The emergency alarm mode is exited when radio power is cycled or by pressing and 

holding the Emergency option button.

This feature notifies a user when an emergency call is being made on their selected P25 
Conventional Talkgroup.