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Ringback testing is an acceptance testing procedure conducted by telephone installers to verify the quality of customer premises wiring to prevent network damage from faulty equipment or installation. The test consists of calling a reverting calling telephone number (ringback number) or a vertical service code with a standard
Ringing tone is often also called ringback tone. However, in formal telecommunication specifications that originate in the Bell System in North America, ringback has a different definition. It is a signal used to recall either an operator or a customer at the originating end of an established telephone call. [2]
Automatic ring back is a service offered by phone companies.. On making a telephone call to a number that is engaged, automatic ring back is a service provided by the telephone company whereby, when the called number becomes available, the caller is rung back, usually with a distinctive "ring back" ring.
In contrast to ring forward, the ringback signal is originated from the receiving or called end of a trunk line during an established connection, to recall the originating operator. [1] The signal is also sent by a coin line operator to recall a customer at a pay station after the customer hangs up, for example to inform the customer of time ...
Mobile phones roaming on a foreign network will often be provided with a ringback tone from the network they are temporarily hosted on. For example, calling a US phone in Europe may return a European ringback tone or vice versa. Increasingly, networks may opt to play their own domestic tones instead, making roaming seamless.
Ringback may refer to: Ringback, the ringing signal in telephony used to recall an operator or customer; Ringing tone, also ringback tone, the audible ringing that is heard by the calling party after dialing; Ringback number, a number used by phone companies to test whether a telephone line and phone number is working
Mobile phones have been fully digital since the early 1990s second-generation ("2G") devices, hence are signaled to ring as part of the protocol they use to communicate with the cell base stations. While the sound produced is still called a "ring", [2] some phones electronically produce a warbling, chirping, or other sound. Variation of the ...
Ireland follows the ETSI recommendation for the busy tone, but the ringback tone is the same as that used in the UK. A few networks in France continue to use a 440 Hz/0.5 s sequence in place of the ETSI recommended 425 Hz/0.5 s sequence, but this is gradually being replaced.