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4.3 Tone List
180 Operating Manual
When Making Calls
While Off-hook
Busy Tone
Reorder Tone
The outside (CO) line you tried
to seize is not assigned or was
denied.
Ringback Tones
Single (3-s interval)
Double (3-s interval)
Single (5-s interval)
Double (5-s interval)
DND Tone
The dialed extension is
refusing incoming calls.
Indication Tones
Tone 1 (Call Waiting Tone)
Tone 2 (Call Waiting Tone)
Single
Double
1 s
1 s
1 s
1 s
1 s
1 s
1 s
15 s
1 s
1 s