APX 4000
Zone Batt Nuis
Speaking into the Microphone
• Fully depress the PTT switch and wait for the 
Talk Permit Tone.  If you talk before you hear 
the Talk Permit Tone, some of what you said 
will be lost
• Release the PTT switch when done speaking.  
For best results, keep messages brief (a few 
seconds)
APX 4000: Transmit Operation
PTT Switch
Microphone