Matrix ETERNITY NE - Call Progress Tones

Matrix ETERNITY NE System Manual 433
Call Progress Tones
What's this?
Call Progress Tones (CPT) are audible tones sent from switching systems such as PSTN or PBX to calling parties
to show the status of phone calls, like dial tone, error tone, ringing error in number dialed, ringing called party, busy
line, etc.
Each CPT has a distinctive tone frequency and cadence assigned to it, for which some standards have been
established by the International Telecommunication Union (ITU).
On the basis of specific frequency, modulating frequency and cadence, the CPTs generated by ETERNITY NE are
categorized as:
CPT Event Sound Duration Timer
Dial Tone 1 Played on lifting the
handset.
Toooooooooooo Played for 7 seconds.
After which Error Tone
starts
Dial Tone Timer
Dial Tone 2 Played on lifting the
handset, when 'Store
and Forward Dialing
a
' is
done.
Toooooooooooo Played for 7 seconds.
After which Error Tone
starts
Dial Tone Timer
Ring Back Tone Played when the
internal number you
have dialed is free.
Turroo... Turrroo Played for 45 seconds Ring Back Tone
Timer
Busy Tone
(Engaged Tone)
High pitch beeps with
equal ON and OFF
periods, played when
the dialed extension is
busy. Busy tone
continues for 7
seconds. This Busy
Tone Timer is
programmable.
Tooooooo.........
Toooooooo
Played for 7 seconds. Busy Tone Timer
Error Tone
(Congestion/
Refusal Tone as
per ITU
Fast beeps, played on a
wrong operation being
performed or a feature
invoked without access.
Too…Too…Too
…Too
Played for 30 seconds Error Tone Timer
Internal Call
Waiting Tone
(Intrusion Tone
as per ITU)
Short beep followed by
longer OFF duration
repeated every second;
played to the busy
extension when another
extension attempts
Interrupt Request/
Barge-In
Beep.……….…
Beep
Played for duration of
the Interrupt Request
Timer or the Barge-In
Timer.
Interrupt Request
Timer, Barge-In
Timer