Appendix A: Tones
Table A-1 Radio Tones
Tone Name
Back to Coverage
Back to Full Service
Clear-to-send
Bad Key Pressed
From Out-of-Service to In
Service
In Emergency
Talk Permit
• Talk prohibit
• System busy
• Time-out timer expire
• Called radio not
available or busy
Call Disconnected or Failed
Due to Network
Toggling Betwen DMO and
TMO
-
Default Tone Diagram
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
[Hz]
2400
2100
1800
1000
900
600
400
200
0
100
200
300
400
[ms]
300
400
[ms]
300
400
[ms]
300
400
[ms]
300
400[ms]
300
400[ms]
300
400[ms]
300
400
500[ms]
300
400[ms]
A-1