Telephone Systems General Description

Appendix – Specifications
System Tones
Strata CTX General Description 11/02 81
Ring tones are described, along with their cadences in Table 31. Due to the limitation in the tone
generation algorithm, the listed tone duration is slightly different from the actual one.
Other types of tones that do not fit in the previous categories are listed in Table 32.
Table 31 Ring Tones
Tone Name Description Ringing Cadence
External Ring 1
Incoming line call from external party (low pitch
tone).
500/640 Hz, 1 sec. On, 3 sec. Off,
repeat.
External Ring 2
Incoming line call from external party (medium
pitch tone).
860/1180 Hz, 1 sec. On, 3 sec. Off,
repeat.
External Ring 3
Incoming line call from external party (high pitch
tone).
1300/1780 Hz, 1 sec. On, 3 sec. Off,
repeat.
External Ring 4
Incoming line call from external party (combined
pitch).
860/1180 Hz 0.5 sec. On, 1300/1780 Hz
0.5 sec. On, 3 sec. Off, repeat.
Internal Ring Incoming call from internal party to DKT.
500 Hz 1sec On, 3 sec. Off, repeat
(once, in case of hands free call).
External Ring for
Standard Telephone
Incoming call from external party (Rings bell
inside standard telephone.)
20 Hz 1 sec. On, 3 sec. Off, repeat.
Internal Ring for
Standard Telephone
Incoming call from internal party.
20 Hz 0.4 sec. On, 0.2 sec. Off, 0.4 sec.
On, 3 sec. Off, repeat.
Recall A call is returned and needs to be answered.
2 kHz interrupted at 10 Hz, 1 sec. On, 1
sec. Off, repeat.
Recall for Standard
Telephone
A call is returned and needs to be answered. 20 Hz, 1 sec. On, 1 sec. Off, repeat.
Ring Over Busy
(Internal)
A call is ringing an idle [DN] or CO line button
while the telephone is busy. Another internal call
offered to an idle button while the terminal is busy.
2 kHz interrupted at 10 Hz, 1 sec. On, 3
sec. Off, twice or repeat (For Call
Waiting, twice only).
Call Waiting
(Internal)
An internal call is waiting for the busy button. A
call is camped-on to a busy [DN] or CO line
button.
Ring Over Busy
(External)
A call is ringing an idle [DN] or CO line button
while the telephone is busy. Another incoming call
is offered to an idle button while the terminal is
busy.
2 kHz interrupted at 10 Hz, 2 bursts of
0.25 sec. apart 0.25 sec., twice apart 3
sec. or continuous (For Call Waiting,
twice only).
Call Waiting
(External)
An external call is waiting for the busy station. A
call is camped-on to a busy [DN] or CO line
button.
Volume Control -
Ringing Speaker
To adjust the speaker volume for ringing state. 500/640 Hz continuous.
Table 32 Administration/Programming Tones
Tone Name Description Ringing Cadence
Confirmation Tone
During user programming or administration
mode, indicates the acceptance of input.
2 kHz two bursts of 0.125 sec. apart
0.125 sec.
Denial Tone
During user programming or administration
mode, indicates the denial of input.
2 kHz 0.75 sec. On.
Volume Control -
Beep
To adjust the beep volume. 2 kHz interrupted 10 Hz, continuous.