8
General Radio Operation
Long,
Low-Pitched
Tone
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.
A Group of
Low-Pitched
Tones (Busy
Tone )
Busy when the system is busy.
Short,
Medium-
Pitched Tone
Valid Key-Press when the correct key is
pressed.
Radio Self-Test
Pass
when the radio passes its
power-up self-test.
Priority Channel
Received
when activity on a priority
channel is received.
Emergency Alarm
Entry
when entering the emergency
state.
Central Echo
when the central controller has
received a request from a
radio.
Long,
Medium-
Pitched Tone
Volume Set when volume changed on a
quiet channel.
Emergency Exit upon exiting the emergency
state.
Table 4: Alert Tones (Continued)
You hear: Tone Name Heard:
MT1500 1.5 UG.book Page 8 Thursday, May 8, 2008 11:17 AM