Panasonic KX-TDA15 - Manual (Page 214)

4.3 What is This Tone?
214 User Manual
While off-hook
When talking to an outside party
When setting the features or programming
Reorder Tone
The outside line you tried to seize
is not assigned or denied.
Ringback Tones
Tone 1
Tone 2
Do Not Disturb (DND) Tone
The dialled extension is refusing
incoming calls.
Indication Tones
Tone 1
Call waiting tone
Tone 2
A call is on hold longer than the
specified time
Warning Tone
This tone is sent 15, 10 and 5
seconds before the specified time
for disconnection.
Confirmation Tones
Tone 1
The feature setting was set
successfully.
Tone 2
Before receiving a page through
an external speaker
1 s
1 s
1 s
1 s
15 s
15 s
1 s
1 s
1 s