Ericsson DT59C - Manual (Page 26)

Description
DT590 26
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.
Ring signals
You can change the ring signals, see section “ Ring signals ” on
page 88.
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