The tables below describe the defaults for each ringing and feedback tone. Check with your system manager to verify that the descriptions in the Meaning column are accurate for your system.

Ringing tones are produced by an incoming call. Feedback tones are those which you hear through the handset or the speaker.

Ringing Tones

1 ring	A call from another extension.
2 rings	A call from outside or from the attendant.
3 rings	A priority call from another extension, or from an Automatic Callback call you placed.
ring-ping (half ring)	A call redirected from your telephone to another because Send All Calls or Call Forwarding All Calls is active.

Feedback Tones

busy signal	a low-pitched tone repeated once per second indicates the number dialed is in use.
call waiting ringback tone	a ringback tone with lower-pitched signal at the end indicates the extension call is busy, and the called party has been given a call waiting tone. (If you hear this tone, you may wish to activate Automatic Callback.)
confirmation tone	three short bursts of tone indicates a feature activation or cancellation has been accepted.
coverage tone	one short burst of tone indicates your call will be sent to another extension to be answered by a covering user.
dial tone	a continuous tone indicates dialing can begin.
intercept/time-out tone	an alternating high and low tone indicates a dialing error, a denial of the service requested, or a failure to dial within a preset interval (usually 10 seconds) after lifting the handset or dialing the previous digit.
recall dial tone	three short bursts of tone followed by a steady dial tone indicates the feature request has been accepted and dialing can begin.
reorder tone	A fast busy tone repeated twice per second indicates all trunks are busy.
ringback tone	A low-pitched tone repeated fifteen times a minute indicates the telephone dialed is being rung.

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