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In order to use a callback service, a subscriber is allocated a unique number in, for example, the US, which must first be dialled in order to trigger a return call. This is known (in the US) as a Direct Inbound Dialing (DID) number, or in the UK as a Direct Dial-In (DDI) number.
In telecommunications, an automatic callback is a computer telephony calling feature that permits a user, when encountering a busy condition or other condition where the called individual is unavailable, to instruct the system to retain the called number and to establish the call when there is an available line or when the called number is no longer busy.
Last-call return, automatic recall, or (on PBX and centrex service) camp-on, is a telecommunication feature offered by telephony service providers to subscribers to provide the subscriber with the telephone number, and sometimes the time, of the last caller. The service may also offer the facility to place a call to the calling party.
The service is typically invoked by keying a number on hearing the engaged tone. In the UK the service is also known as Ringback. [1] In the United States the service is often called Auto Redial. In the United States Army on post wide communications networks, this is referred to as Callback or Automatic Callback.
Callback (comedy), a joke which refers to one previously told; Callback (computer programming), callable (i.e. function) that is passed as data and expected to be called by another callable. Callback (telecommunications), the telecommunications event that occurs when the originator of a call is immediately called back in a second call as a response
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A typical Web callback form. Web callback is a technology where a person can enter his or her telephone number in a form on a web site. The company who owns that Web site will then receive the Web callback request and a call center agent will call the person who made the request back on the number they entered.
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related to: callback service