APX 4000
Out of Range Tone
• If your radio is receiving the Out-of-Range Tone, your radio 
is NOT seen by the system
• You cannot Talk or Receive messages on trunked channels
• System Channels and the Emergency Button will not 
work when you are Out-of-Range
• Your operations may need to utilize Ground Channels for 
communication
APX 4000: Audio Alerts
Zone Batt Nuis