14
General Radio Operation
Alert Tones
Your radio uses alert tones to inform you of radio conditions.
Table 6: Alert Tones 
You hear: Tone Name Heard:
Short, 
 
Low-Pitched 
Tone
Invalid Key-
Press
when the wrong key is pressed.
Radio Self-
Test Failed
when the radio fails the power-up 
self test.
Reject when an unauthorized request is 
made.
Time-Out 
Timer 
Warning
four seconds before time out.
Long, 
 
Low-Pitched 
Tone
No ACK 
Received
when the radio does not receive an 
acknowledgment. 
Time-Out 
Timer Timed 
Out
after time out.
Talk Prohibit/ 
PTT Inhibit
(when the PTT button is pressed) 
transmissions are prevented.
Out-of-Range (when the PTT button is pressed) 
the radio is out of range of the 
system.
Invalid Mode when the radio is set to an 
unprogrammed channel.
Individual Call 
Warning Tone
when the radio is in Individual Call 
without any activity for more than 6 
seconds.
94C06.book  Page 14  Wednesday, June 23, 2010  11:41 AM