Introduction 1–211. IntroductionTones, cont. Intrusion tone followedby a ringing-beep toneThe party you called is on thephone, but has received a callwaiting indication. Stay on thephone until the party answers.Long tone, followed byan intrusion tonerepeated every 8 secs.Busy override and speaker callintrusion reminder1-sec. tone after dialing There is a short queue for anoutgoing trunk.Ringing (ringback)toneThe phone you called is ringing.Short tone every 20 sec. Internal call waitingSingle (conference)toneA new party has been added to aconference.Steady high tone A technician is testing yourphone.3 short tones (confirma-tion tone)A feature has been successfullyactivated.3 short tones followedby dial toneAdditional input, such as a PIN,is required.30-sec. tone afterdialingThere is a long queue for anoutgoing trunk.2 short tones every 20secs.External call waitingVery short tone afterdialingYou have been routed to the nextoutgoing trunk or to a moreexpensive route.Wavering (error) tone Invalid feature requestSound Meaning