Tones heard through handset or headset
Issue 5 July 2001 25
Call Waiting
Ringback
Low 15 times a
minute with
decreasing
volume
during the
last 0.2
second
A call is waiting at the console and
the called party has been notified that
the call is waiting.
Incoming
Call Ringing
On-off,
low
0.5 second An incoming call is waiting to be
answered.
Calls Waiting
(Queued
Calls)
On-off,
low
0.25 second One or more incoming calls are
waiting to be answered.
Timed
Reminder
(Attendant
Recall)
high On for 0.5
second; off
for 1
second
A single-party call is on hold for
longer than the time allowed by your
company. This tone also occurs when
someone on a conference call calls
you or an unanswered transferred call
returns to you.
Emergency
Access
Ringing
On-Off,
high and
low
Siren-like A tone that indicates an emergency.
This ringing tone is heard on the
latest models of the basic console and
all models of the enhanced console.
Table 5. Ringing and tones descriptions (Continued)
Tone name Pitch Frequency Meaning
Continued on next page
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