14221-1850-2000, Rev. A
37
4.9 ALERT TONES
The radio provides audible Alert Tones or “beeps” to indicate various operating conditions. Some of the
most common tones are described in Table 4-6.
Table 4-6: Alert Tones
Ready to Talk Tone
Unencrypted (Analog FM
or P25 digital)
After a PTT is pressed, this is an audible indication (tone) for
you to begin speaking into the microphone.
1000 Hz tone for 25 ms
Ready to Talk Tone
Encrypted P25 digital
After a PTT is pressed, this is an audible indication (tone) for
you to begin speaking into the microphone.
1200 Hz tone for 25 ms
PTT Denied
PTT not possible. Momentary tone is present:
• Receive only
• Key not found
• PTT button disabled
• Emergency button disabled
• Emergency not supported for current channel
• Clear transmit denied
• Trunking Channel unavailable
544 Hz tone for 75 ms
Maximum transmit duration
expires
Maximum transmit duration is exceeded.
5 beeps of 2400 Hz tone and
then a 544 Hz tone for as long
as PTT is pressed
Emergency Call Received Radio is receiving an emergency call or priority call.
600 Hz tone for 250 ms and
Alternate Emergency Tone
If enabled via programming, the radio plays an alternate
emergency tone when declaring and receiving an
emergency.
Sequence of tones:
• 1000 Hz tone for 150 ms
• Silence for 20 ms
Out of Range Radio fails to find a local control channel.
Programmable via RPM2:
• Disabled (no tone)
• Slow (tone every 15s)
• Medium (tone every 10s)
• Fast (tone every 5s)
• Tone is 544 Hz for 75 ms
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