Ringing tone

ringback toneCRBTringback tonesringbacksAudible ringingAudible ringing toneringbackaudible ringing, or ringing toneCaller ring back tonesCaller ringback tone
Ringing tone (audible ringing, colloquially also ringback tone) is a signaling tone in telecommunication that is heard by the originator of a telephone call while the destination terminal is alerting the receiving party.wikipedia
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Ringing (telephony)

ringingMagenta boxcall bell
Audible ringing is typically a repeated tone that is not necessarily synchronous with the cadence of the power ringing signal that is sent to the called party. However, in formal telecommunication specifications that originate in the Bell System in North America, ringback has a different definition.
It is therefore also commonly referred to as power ringing, to distinguish it from another signal, audible ringing, or ringing tone, which is sent to the originating caller to indicate that the destination telephone is in fact ringing.

Signal tone

ident tonesignaling tonetone transmissions
Ringing tone (audible ringing, colloquially also ringback tone) is a signaling tone in telecommunication that is heard by the originator of a telephone call while the destination terminal is alerting the receiving party.
Typical well-known call progress tones are dial tone, ringing tone, busy tone, and the reorder tone.

Telephone call

callphone callphone calls
Ringing tone (audible ringing, colloquially also ringback tone) is a signaling tone in telecommunication that is heard by the originator of a telephone call while the destination terminal is alerting the receiving party.

Ringtone

ringtonesring tonePolyphonic
The caller is informed about the progress of the call by the audible ringing signal, often called ringback tone.

Ringback tone advertising

RingBack Tone Advertising, or RBT-Ads (also known as RingBack Advertising, Ad RingBack, Ad-RBT, AdRBT, Voice Ads, or Biz-Ring), replaces the Ringback tone period, or standard acoustic signal a caller hears that indicates the called phone is ringing, with advertisements or other promotional messages.

Telecommunication

telecommunicationscommunicationstelecom
Ringing tone (audible ringing, colloquially also ringback tone) is a signaling tone in telecommunication that is heard by the originator of a telephone call while the destination terminal is alerting the receiving party.

Signalling System No. 7

SS7Signaling System 7Signalling System 7
Audible ringing is usually generated in the switching system closest to the calling party, especially when under the control of strict implementations of Signalling System No. 7 and the Customized Application of Mobile Enhanced Logic (CAMEL) signaling system.

Customized Applications for Mobile networks Enhanced Logic

CAMELCustomised Applications for Mobile networks Enhanced LogicCustomized Application of Mobile Enhanced Logic
Audible ringing is usually generated in the switching system closest to the calling party, especially when under the control of strict implementations of Signalling System No. 7 and the Customized Application of Mobile Enhanced Logic (CAMEL) signaling system.

In-band signaling

in-bandin-band signallinginband
It may also be generated in the distant switch, transmitted in-band, so that in analog networks the caller could monitor the quality of the voice path of the connection before the call is established.

Bell System

Bell Operating CompanyBell Operating CompaniesBell Telephone
However, in formal telecommunication specifications that originate in the Bell System in North America, ringback has a different definition.

ETSI

European Telecommunications Standards InstituteEuropean Telecommunications Standards Institute (ETSI)Telecommunications in Europe
Many European countries use tones which follow the recommendation of the European Telecommunications Standards Institute.

Mexico

MexicanMéxicoMEX
In North America (excluding Mexico, Central America and parts of the Caribbean), the standard audible ringing tone is a repeating 2-second tone with a 4-second pause between.

Central America

CentralCentral AmericanCentral American Isthmus
In North America (excluding Mexico, Central America and parts of the Caribbean), the standard audible ringing tone is a repeating 2-second tone with a 4-second pause between.

Caribbean

the CaribbeanWest IndiesWest Indian
In North America (excluding Mexico, Central America and parts of the Caribbean), the standard audible ringing tone is a repeating 2-second tone with a 4-second pause between.

United Kingdom

BritishUKBritain
In the United Kingdom, Republic of Ireland, Australia, New Zealand, and many Commonwealth nations, it is a double ring.

Republic of Ireland

IrelandIrishRepublic
In the United Kingdom, Republic of Ireland, Australia, New Zealand, and many Commonwealth nations, it is a double ring.

Australia

AUSAustralianCommonwealth of Australia
In the United Kingdom, Republic of Ireland, Australia, New Zealand, and many Commonwealth nations, it is a double ring.

New Zealand

NZLNZKiwi
In the United Kingdom, Republic of Ireland, Australia, New Zealand, and many Commonwealth nations, it is a double ring.

Commonwealth of Nations

CommonwealthBritish CommonwealthCommonwealth countries
In the United Kingdom, Republic of Ireland, Australia, New Zealand, and many Commonwealth nations, it is a double ring.

India

IndianRepublic of IndiaIND
In India, the ringing tone is called caller ringback tone (CRBT), which varies with different network operators. Also known as caller tunes in some countries, such as India, ringback music is a service offered by mobile network operators to permit subscribers to select music or even install personalized recorded sounds for audible ringing.

Patent

patentspatent lawpatented
Patents for personalized ringing tone delivery systems were first filed in Korea by Kang-seok Kim (10-1999-0005344) in October 1999 and in the United States by Mark Gregorek et al. (U.S. patent 5,321,740), Neil Sleevi (U.S. patent 4,811,382), and Karl Seelig (U.S. patents 7,006,608 and 7,227,929).

Mobile network operator

wireless carriernetwork operatorMNO
Also known as caller tunes in some countries, such as India, ringback music is a service offered by mobile network operators to permit subscribers to select music or even install personalized recorded sounds for audible ringing.