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Types of tone
TYPE OF TONE
Dial tone
Ring back tone
Fast busy tone
Ringing tone
Power management
tone
Unregistered tone
Progress tone
Call waiting tone
62
Types of tone
SOUND
Continuous tone
Long tones with
approx. 4 seconds
interval
Continuous short
tones
Depends on the
telephone set
Continuous tone
duration approx. 0.5
seconds
Continuous tone
duration approx. 1
second
Short tone with 2
second interval
Short tone with 3
second interval
DESCRIPTION
Telephone ready
for use
Call being
connected
• C alled number
busy
• Call failure
• P hone off hook
for a long
time (approx.
10 seconds)
and also after
completion of
using command
tools
Incoming call
Phone is in standby
mode
Phone is not
registered
Waiting to be
connected after
dialing
There is an
incoming call during
in progress call
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Table of Contents
Troubleshooting
