E F Johnson Company 2425795 사용자 설명서

Viking™ VP600 Portable Radio Operating Manual

4-21

Any button press will silence the Evac Alert tone but only a PTT press will cancel the 
Evac Alert display message and exit the Evac Alert state.  A Fire Responder subscriber 
will only process one Evac Alert message every 60 seconds to avoid multiple Evac Alert 
tones sounding. This feature makes use of the P25 Signaling Retry Attempts and Retry 
Response Timer settings defined for the radio.

Evac Alert works in either simplex mode or through a repeater configured for data repeat 
mode, both of which require a Responder and Commander radio. Currently the EFJohnson 
infrastructure does not support the sending of Evac Alert messages so a Commander radio 
is required.

The Audible RSSI can be programmed to provide the Fire First Responder an audible 
indication when the RSSI drops below certain thresholds indicating a poor coverage area. 
When enabled, the First Responder radio will measure RSSI at the beginning of a call and 
may provide tone notifications after the call is over. The following provides the tones 
heard in each RSSI range. 

Table 4.3  RSSI Tones (Fire Ground Mode)

Above Good

3 or 4 bars

No tone

Above Fair, Below Good 

2 bars

2 beeps

Above OOR, Below Fair

1 bar

4 beeps

Below OOR

“X”

4 beeps