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Appendix D -Tones
Tones are audible signals of various frequencies that give information about the status of calls and features. While
using the Coral system, many different tones will be heard. These tones may vary for different locations, as each
system is customized during installation. While the sounds of the tones themselves are not described, their general
use is discussed below. In order to familiarize yourself with these tones, try accessing various features and listen to
the resultant tone signals. The most frequently heard tones are:
Break-In/Break-
Out Tone
A warning tone received by a station user indicating that a third party has broken into, or is leaving (breaking
out) an existing conversation.
Break-In Warning
Not Used in North America
Tone heard during the entire break-in period. Indicates that a third party is listening.
Busy Tone
When the destination you have dialed (extension or trunk) is busy.
Call Waiting Tone
Tone heard at your GKT station while engaged on a call or activating a feature indicating that another call is
waiting to be answered (this appears only when multi-appearance is defined for your GKT station).
Confirmation Tone
Tone heard indicating that the telephony feature has been activated or deactivated.
Dial Tone
Tone heard after off-hooking (lifting) your handset from idle.
Distinctive Dial
Tone
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
