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  2. Anonymous call rejection - Wikipedia

    en.wikipedia.org/wiki/Anonymous_call_rejection

    In many voice telephone networks, anonymous call rejection (ACR) is a calling feature implemented in software on the network that automatically screens out calls from callers who have blocked their caller ID information. The caller usually hears a voice message explaining that their call cannot be connected unless they display their number. Or ...

  3. Caller ID - Wikipedia

    en.wikipedia.org/wiki/Caller_ID

    Caller-ID system response sounds in various cases: analog, ISDN and digital PBX Caller identification (Caller ID) is a telephone service, available in analog and digital telephone systems, including voice over IP (VoIP), that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.

  4. Call blocking - Wikipedia

    en.wikipedia.org/wiki/Call_blocking

    These devices rely on caller ID information and thus a phone blocker requires a caller ID service active on the line for blocking to function. Treatment of blocked calls may include: Sending the caller to voicemail; Sending the caller to busy signal; Sending the caller to "Number No Longer in Service" Sending the caller to "Keep Ringing"

  5. Phone etiquette 101: When it’s rude to be on speaker — and ...

    www.aol.com/news/phone-etiquette-101-rude...

    And remember: We don’t all leave call-back numbers that are the same as the number that shows up on caller ID. For those you are more familiar with: Choose your voicemail messages wisely.

  6. Caller ID spoofing - Wikipedia

    en.wikipedia.org/wiki/Caller_ID_spoofing

    Caller ID spoofing is a spoofing attack which causes the telephone network's Caller ID to indicate to the receiver of a call that the originator of the call is a station other than the true originating station. This can lead to a display showing a phone number different from that of the telephone from which the call was placed.

  7. Nuisance call - Wikipedia

    en.wikipedia.org/wiki/Nuisance_call

    A nuisance call is an unwanted and unsolicited telephone call. Common types of nuisance calls include prank calls, telemarketing calls, and silent calls. Obscene phone calls and other threatening calls are criminal acts in most jurisdictions, particularly when hate crime is involved. [1] Unsolicited calls may also be used to initiate telephone ...

  8. How to identify Medicare scam calls - AOL

    www.aol.com/identify-medicare-scam-calls...

    Medicare scam calls are a type of identity theft. The goal of most calls is to obtain a person’s Medicare number and other sensitive information, such as bank account or Social Security numbers.

  9. Calling Name Presentation - Wikipedia

    en.wikipedia.org/wiki/Calling_Name_Presentation

    In the US, the caller's name, or CNAM information, is not sent during a call. Rather, the terminating carrier is responsible for providing the Caller ID information to its customer. The terminating carrier performs a database lookup using the caller's phone number to obtain the name information to display with Caller ID.