Description

Tones and signals

The following different tones and signals are sent from the exchange to your phone.

Tone characteristics

The tones shown in this section are the most used tones worldwide. Many markets use a differing tone for one or more situations.

Dial tone

Special dial tone

Ringing tone or queue tone

Busy tone

Congestion tone

Number unobtainable tone

Call waiting tone

 

 

 

 

 

Intrusion tone

 

 

 

 

 

 

 

 

 

 

Conference tone

every 15 seconds (to all parties)

Verification tone

 

 

 

 

 

Warning tone, expensive route

 

 

 

 

 

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Dialog 4223 Professional/Dialog 4225 Vision

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Aastra Telecom 4223, 4225 manual Tones and signals, Tone characteristics