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4.3 What is This Tone?
166 User Manual
When you make calls
While off-hook
Tone 3
• After pressing
TRANSFER or Recall/
hookswitch to hold a call
temporarily (ex. Call
Splitting)
• While a called PS is
being searched
• When Account Code
Entry is performed
• When answering a
Timed Reminder call
with no message
Tone 4
Message waiting indication
was received.
Busy Tone
Reorder Tone
• The outside line you tried
to seize is not assigned or
denied.
Ringback Tone 1
Normal ringback tone
Ringback Tone 2
Special ringback tone for
DISA call
Do Not Disturb (DND)
Tone
The dialled extension is
refusing incoming calls.
Indication Tones
Tone 1
Call waiting tone
1 s
15 s