Tones (cont.) B-2 FlexSet 120/280 User Guide
Distinctive Dial Tone
(DDT)
The Distinctive Dial Tone (DDT) indicates that certain features are in use at your telephone, for
example, when you have programmed your telephone not to receive calls, with either Call Forward
All, or Do Not Disturb, and you lift the handset. DDT is also heard between patterns of digits when
dialing certain features, for example, Account Code feature. When the following features are
applied at your telephone, the distinctive dial tone will be heard when the handset is lifted:
• Call Forward All
• Do Not Disturb
• Messages Waiting
• Secondary COS
Inside Dial Tone After off-hooking (lifting your handset from idle) or pressing speakerphone (SPKR) key.
Key Click When defined for the FlexSet, a tone heard when pressing a number on the dial pad.
Outside Dial Tone When connected to an external (trunk) line.
Reorder Tone A tone you will receive if you have tried to access a denied feature, or you have misdialed, etc., or:
• You have stayed off-hook too long before dialing
• The station you have called has not answered in time. Perform on-hook and call later
• The station you have called is in Do Not Disturb status
Ringback Tone A tone heard when the destination you have dialed is ringing.
Second Ringback
Tone
Indicates that the destination you have dialed is busy, and your call is waiting to be answered.
Appendix B - Tones (cont.)
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