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  2. Callback (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Callback_(telecommunications)

    For example, if a customer from Spain is calling a phone number in Australia, and it costs 8 cents per minute to phone Spain from the US (the callback, which is an incoming call) and 20 cents per minute to phone Australia from the US (the destination call, which is an outgoing call), then the caller will pay a total of 28 US cents a minute ...

  3. Last-call return - Wikipedia

    en.wikipedia.org/wiki/Last-call_return

    Call again, a form of automatic ring back, allows a caller, on reaching a busy signal, to hang up, dial a special code, and be called back automatically when the called number is no longer busy, usually with a limit of 30 minutes. Call return allows a customer to dial a code that identifies the last incoming call. On some types of central ...

  4. Unstructured Supplementary Service Data - Wikipedia

    en.wikipedia.org/wiki/Unstructured_Supplementary...

    USSD on a Sony Ericsson mobile phone (2005). Unstructured Supplementary Service Data (USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator's computers.

  5. This is why you should never call back an unknown number - AOL

    www.aol.com/article/lifestyle/2019/05/03/this-is...

    So if your bank leaves a voicemail, don’t just call back the number from the missed call. Find the official number online and dial that, suggests Levin. “Never trust—always verify,” he says.

  6. Callback - Wikipedia

    en.wikipedia.org/wiki/Callback

    Callback (telecommunications), the telecommunications event that occurs when the originator of a call is immediately called back in a second call as a response; Callback verification, a method for e-mail address verification used in SMTP; Web callback, a technology that provides telephone callback for websites

  7. Automatic callback - Wikipedia

    en.wikipedia.org/wiki/Automatic_callback

    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.

  8. Web callback - Wikipedia

    en.wikipedia.org/wiki/Web_Callback

    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.

  9. Collect call - Wikipedia

    en.wikipedia.org/wiki/Collect_call

    It offers reverse charge calls from any fixed line phone, pay phone and most mobile phones (even if the prepaid credit has run out), to most fixed land line and mobile phones in the Republic of Ireland. [13] The company charges €2.99 to connect the call, including the first 60 seconds of the call, and €0.593 for every subsequent minute.