Introduction 1–21
1. Introduction
Tones, cont. Intrusion tone followed
by a ringing-beep tone
The party you called is on the
phone, but has received a call
waiting indication. Stay on the
phone until the party answers.
Long tone, followed by
an intrusion tone
repeated every 8 secs.
Busy override and speaker call
intrusion reminder
1-sec. tone after dialing There is a short queue for an
outgoing trunk.
Ringing (ringback)
tone
The phone you called is ringing.
Short tone every 20 sec. Internal call waiting
Single (conference)
tone
A new party has been added to a
conference.
Steady high tone A technician is testing your
phone.
3 short tones (confirma-
tion tone)
A feature has been successfully
activated.
3 short tones followed
by dial tone
Additional input, such as a PIN,
is required.
30-sec. tone after
dialing
There is a long queue for an
outgoing trunk.
2 short tones every 20
secs.
External call waiting
Very short tone after
dialing
You have been routed to the next
outgoing trunk or to a more
expensive route.
Wavering (error) tone Invalid feature request
Sound
Meaning
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