AASTRA DT4x2 for BusinessPhone User Guide EN - Manual (Page 22)

Description
BusinessPhone – Cordless DT412/DT422/DT432 22
Tones
Tones are audible in the Cordless.
Dial tone
(System ready to accept digits)
Special dial tone
(System ready to accept digits,
active Diversion on phone)
Ringing tone
(Ringing signal to called party)
- repeated after 4 s
Special ringing tone
(Ringing signal to Line 2)
- repeated after 4 s
Busy tone
(Called party is busy)
Number unobtainable tone
(Called number not accessible or vacant)
Call Waiting tone
Blocking tone
(Call cannot be executed due to congestion
or called party blocked)
Verification tone
(Verification that ordered function is
accessed)
Intrusion tone
(Sent to all parties during Intrusion)
Conference tone
(Sent to all participants in a Conference)
- repeated after 15 s