Handset Tones
System 25 signals you with tones that are heard through the
handset. The tones and their descriptions are listed below.
DIAL TONE
lllllllllllllllllllllllllllllllllllllllllllllllllIll
You can dial.
CONFIRMATION TONE
Your action has been accepted.
RINGBACK TONE
The number you dialed is ringing.
SPECIAL RINGBACK TONE
one short, dull tone)
The person you dialed is busy, and has been notified of Call
Waiting.
BUSY TONE
IIIII IIIII IIIII
The number you dialed is busy.
FAST BUSY TONE
The number you dialed was busy, misdialed, or restricted.
CALL WAITING TONE (short tone(s) heard during a call)
(the waiting call is an inside call)
III
(the waiting call is an outside call)
III III
You have a call waiting to be answered.
QUEUEING TONE
Your request for a callback has been confirmed.
DEQUEUEING TONE
The extension or outside line that you requested for callback is
now available.
(a continuous steady tone)
(three short tones)
II II II
(repeating on/off tone)
IIIIIIIIIIIIIII IIIIIIIIIIIIIII
IIIIIIIIIIIIIIIII II (one long tone and
(repeating on/off tone)
(fast repeating on/off tone)
Ill Ill Ill Ill
(five short tones)
II II II II II
(three short tones)
II II II
3
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