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6.4 What is This Tone?
232
Appendix
When you make calls
While off-hooking
Tone 3
• The alarm is being
answered.
• Enter an account code to
turn off the tone.
Tone 4
Message waiting indication
was received.
Busy Tone
Reorder Tone
• The outside line you tried
to seize is not assigned or
denied.
• The wrong account code
was entered.
Ringback Tone 1
Normal ringback tone
Ringback Tone 2
Special ringback tone for DISA
call
Do Not Disturb Tone
The dialled extension is
refusing incoming calls.
Indication Tones
Tone 1
Call waiting tone (default)
Tone 2
Call waiting tone from outside
1 s
15 s
5 s