3-3SYSTEM TONESTONE FREQUENCIES CADENCEDIAL TONE 350 + 440 Hz CONTINUOUSRINGBACK TONE 440 + 480 Hz 1 sec on + 3 sec offDID RINGBACK TONE 440 + 480 Hz 2 sec on + 4 sec offBUSY TONE 480 + 620 Hz 0.5 sec on + 0.5 sec offDND/NO MORE CALLS 480 + 620 Hz 0.25 sec on + 0.25 sec offTRANSFER/CONF 350 + 440 Hz 0.1 sec on + 0.1 sec offCONFIRMATION TONE 350 + 440 Hz 0.05 sec on + 0.05 sec offERROR TONE 480 + 620 Hz 0.05 sec of tone 1/0.05 sec of tone 2CONTINUSCONTINUSCONTINUSFOR TEN SECONDSCONTINUSFOR TWO SECONDSFOR TWO SECONDSIntercom Dial Tone – A steady tone that indicates you can begin dialing.DIAL TONERingback Tone – Indicates the station you dialed is ringing.RINGBACK TONE – 1000ms ON/3000ms OFFBusy Signal – Indicates the station you dialed is busy.BUSY TONE – 500ms ON/500ms OFFDND/No More Calls Tone – Fast busy tone advises you the station youdialed is in the Do Not Disturb mode or cannot receive any more calls.DND/NO MORE CALL TONE – 250ms ON/250ms OFFTransfer/Conference Tone – Indicates your call is being held and youcan dial another party.TRANSFER/CONF TONE – 100ms ON/100ms OFFConfirmation Tone – Very short beeps followed by dial tone indicateyou have correctly set or canceled a system feature.CONFIRMATION TONE – 50ms ON/50 ms OFFERROR TONE – Adistinctive two level beeping tone indicates youhave done something incorrectly. Try again.ERROR TONE – 50ms of tone 1/50ms of tone 2