Tones

Last Updated : Dec 21, 2022 |
The following tables outline the different tones used by the system. For each tone, the frequency and cadence are detailed:
Prolog information
Metadata
Keywords:
  • Frequency - All tone frequencies are in Hertz (Hz).
    • Where a tone uses a combination of frequencies, the frequencies are shown separated by a + symbol. 
    • Where a tone uses alternating frequencies, the frequencies are shown separated by a / symbol.
  • Cadence - The tone cadence is indicated as either a sequence of on/off times or as a sequence of alternating frequency 1/frequency 2 times. Where a portion of the sequence is enclosed in ( ) symbols, it indicates a repeating sequence.

Localized Tones

The table below describes the different system tones. The tones used are determined by the system locale setting.
Note:
In some locales, the same tone sound may be used for several purposes, for example for Busy and Fast Busy tones may be the same.
Tone
Description
Alternate Dial Tone
This tone is also known as 'interrupted', 'broken' or 'stutter' dial tone. It is used on extensions when the user has DND, Follow-Me or Forward Unconditional set. It is also used on analog phones when the user has a call on hold, for example during a transfer.
Busy Tone
Used when the number called is busy.
Call Waiting Tone
Used when a user has a call waiting enable and a call waiting.
Dial Tone
Normal dial tone.
Disconnect Tone
Tone play when the far end has ended the call. For IP and digital extensions, the system can be configured to either play disconnect tone or to return to idle. See Locale Specific Behaviors.
Fast Busy Tone
No line or channel available.
Intercept Busy Tone
Unallocated number.
Number Unobtainable Tone
Number Unobtainable.
Ring Tone
Other end is ringing. This tone is also known as 'ringback'.
Secondary Dial Tone
Used when accessing an external trunk using a short code or ARS that specifies secondary dial tone. If no specific tone is defined for the locale, normal dial tone is used.

Non-Localized Tones

Tone
Tone (Hz)
Cadence (s)
Value
Notes
Music-on-Hold
Tone
440
“Tone” MOH
Cadence
0.2/0.2/0.2/5
Call Listen
Cadence
0.07/0.1/0.07/0.1/0.07
No Repeat
Conference Entry
Tone
400
Cadence
0.2
No Repeat
Conference Exit
Tone
400
Cadence
0.2/0.2/0.2
No Repeat
Conference Repeat
Tone
400
Cadence
0.2/10
Related links
Definitions