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4.3 Identifying Tones
User Manual 161
While Off-hook
When Talking to an Outside Party
When Setting the Features or Programming
Double (5-s interval)
DND Tone
The dialled extension is
refusing incoming calls.
Indication Tones
Tone 1 (Call Waiting Tone)
Tone 2 (Call Waiting Tone)
Single
Double
Triple
Tone 3 (Hold Alarm Tone)
A call has been on hold for
longer than the specified time.
Warning Tone
This tone is sent 15 seconds
before the specified time for
disconnection.
Confirmation Tones
Tone 1
The feature was set
successfully, or the Extension
Lock feature was set or
cancelled.
1 s
1 s
15 s
1 s
1 s
1 s
15 s
1 s
1 s