Panasonic KX-TDA15 User Manual

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4.3 What is This Tone?
User Manual
191
When you make calls
Tone 2
Any one of the following 
features is set:
Absent Message
Background Music
Call Forwarding
Call Pickup Deny
Call Waiting
Do Not Disturb
Extension Lock
Executive Busy 
Override Deny
Hot Line
Timed Reminder
Tone 3
After pressing 
TRANSFER or 
Recall/hookswitch to 
hold a call temporarily 
(e.g., 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
1 s
1 s