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What is This Tone?
6-18 Appendix
1 s
1 s
When you make calls
Busy Tone
While off-hooking
Indication Tones
When talking to an external party
Warning Tone
This tone is sent 15, 10 and 5
seconds before the time limit.
Ringback Tone
Tone 1
Call Waiting tone (default)
Reorder Tone
• The outside line you tried to seize is
not assigned or denied.
• The wrong account code was entered.
Do Not Disturb Tone
The dialed extension is refusing
incoming calls.
CCBS Tone
The called party on an ISDN line is
busy.
15 s
15 s
Tone 2
Call Waiting tone from outside
Tone 3
Call Waiting tone from another
extension
Tone 4
A call is held for more than a
specified time (default: 60 seconds).
5 s