Appendix B - Tones
B-1
SLT User Guide
Appendix B - Tones
While using the Coral communication system, many different tones are heard. These tones may vary for different
locations as each system is customized during installation. Therefore, the sound of the tones are not described;
instead, their general use is listed 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
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
Tone
Background tone heard during the entire break-in period. Indicates that a third party is
listening. (Not used in North America.)
Busy (Engaged) Tone
When the destination you have dialed (extension or trunk) is busy.
Call Waiting Tone
Tone heard while engaged on a call indicating that another call is waiting to be answered.
Confirmation Tone
Tone heard when you have successfully accessed or activated a feature (for example Camp-
On, or Call Forward).
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
features. When the following features are applied at your telephone, the distinctive dial
tone will be heard when the handset is lifted from idle:
• Call Forward All
• Do Not Disturb
• Messages
• Secondary COS
Inside Dial Tone
After off-hooking (lifting your handset from idle) or pressing speakerphone (SPKR) key.
