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4 tones – AASTRA DT390 for BusinessPhone User Guide EN User Manual

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ORDLESS

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HONE

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USINESS

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HONE

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1424-EN/LZT 103 091 Uen D 2010-02-12

3.4 Tones

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

Tone Description
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