World Tone Database
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International call progress tones for IP-PBX and VoIP telephony
Telephone Line Signalling
Tones from PSTN
Busy tone
Call waiting tone
Caller waiting tone
Comfort tone
Conference tone
Confirmation tone
Congestion tone
Dial tone
Disconnect tone
End of three party service tone
Executive override tone
Holding tone
Howler tone
Intrusion tone
Line lock-out tone
Negative indication tone
Notify tone
Number unobtainable tone
Off-hook warning tone
Pay tone
Payphone recognition tone
Preemption tone
Queue tone
Recall dial tone
Record tone
Ringing tone
Search tone
Second dial tone
Special dial tone
Special information tone
Waiting tone
Warning tone
Tone aliases
Acceptance tone
Audible ring tone
Busy override warning tone
Busy verification tone
Engaged tone
Facilities tone
Fast busy tone
Function acknowledge tone
Identification tone
Intercept tone
Permanent signal tone
Positive indication tone
Re-order tone
Refusal tone
Ringback tone
Route tone
Service activated tone
SIT
Special ringing tone
Stutter dial tone
Switching tone
Test number tone
Test tone
Trunk offering tone
Signals to PSTN
Answer tone
Billing silence
Calling tone
Guard tone
Pulse dialing
Tone dialing
Signals from PSTN
DC conditions
Metering pulse
Ringing signal
More information...
Compliance data (DAA database)
ITU-T E.180/Q.35
Technical characteristics of tones for the telephone service
List of tones used in national networks - Mar-1998
Various tones used in national networks (Annex) - May-2010
Related product:
CPT-Master
tone generator app
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