E F Johnson Company 2425M80 Benutzerhandbuch

Draft 02 - Sep 1 2015

5-10

If Emergency Hot Mic has been enabled for emergency calls for the system, automatic 
transmitting occurs with microphone audio unmuted without having to manually press the 
PTT switch. The automatic transmit period is programmed for 10-120 seconds in ten-
second intervals. If this feature or emergency calls are not enabled, automatic transmitting 
does not occur. This feature is initiated only on the first press of the Emergency switch. 
Subsequent presses do not trigger automatic transmissions. To reset this function, hold 
emergency button or cycle power.

To place an Emergency Call:

1 If required, select a channel of a system on which Emergency Calls are enabled and 

press the Emergency option switch. The Emergency Call is then sent as described in 
Section 5.9.1 if applicable.

2 If the preceding Emergency Hot Mic feature is enabled, the call is automatically 

transmitted without pressing the PTT switch. If it is disabled, press the PTT switch and 
begin speaking as with a standard call. If the channel is changed, operation continues on 
the new channel in the emergency mode.

3 With analog calls, subsequent presses of the PTT switch cause the DTMF emergency 

ID to be sent according to the ANI programming (if DTMF ANI is enabled on the 
channel). With digital calls, the calls continue to have the emergency bit set.

4 If the Surveillance Mode is enabled (see Section 4.10), all indicators, lights, and tones 

are disabled. If “No Receive Activity During Emergency” is programmed, receive 
audio, the front panel LED, and receive icons are disabled in the receive mode.

5 To exit this mode, cycle radio power or press and hold the Emergency switch.

The Viking radio provides two means of activating emergency mode. With an emergency 
button programmed, the radio will enter emergency mode upon a press or a press and hold. 
Pressing and holding the emergency button while in emergency mode will cancel 
emergency. When enabled, the Emergency Press and Hold feature restricts activation to 
the press and hold scenario.

With the emergency press and hold feature enabled, the emergency button must be pressed 
and held for the duration of the press and hold timer for emergency mode to be activated. 
If the button is released before the timer has expired a bad beep tone sounds and 
emergency mode fails to activate. To cancel emergency mode, the emergency button must 
be pressed and held for the duration of the press and hold timer again.