AASTRA DT690 - Manual (Page 34)

C ORDLESS P HONE FOR MX-ONE™
34 1424-EN/LZT103 088 Uen F5 2012-03-14
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