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  2. Call detail record - Wikipedia

    en.wikipedia.org/wiki/Call_detail_record

    A call detail record (CDR) is a data record produced by a telephone exchange or other telecommunications equipment that documents the details of a telephone call or other telecommunications transactions (e.g., text message) that passes through that facility or device. The record contains various attributes of the call, such as time, duration ...

  3. Pen register - Wikipedia

    en.wikipedia.org/wiki/Pen_register

    A device which records or decodes electronic or other impulses which identify the numbers called or otherwise transmitted on the telephone line to which such device is dedicated. A pen register is similar to a trap and trace device. A trap and trace device would show what numbers had called a specific telephone, i.e., all incoming phone

  4. Trap and trace device - Wikipedia

    en.wikipedia.org/wiki/Trap_and_trace_device

    Title 18 of the United States Code defines a trap and trace device as follows: . The term "trap and trace device" means a device or process which captures the incoming electronic or other impulses which identify the originating number or other dialing, routing, addressing, and signaling information reasonably likely to identify the source of a wire or electronic communication, provided ...

  5. Call management - Wikipedia

    en.wikipedia.org/wiki/Call_management

    A call detail record or call recording software is used to record all received calls, including time, date, duration, calling number and called number for future reference. [ 4 ] Interactive voice response is a sound recording device that allows a caller to give information to a system verbally about what services or support they require.

  6. Voicemail - Wikipedia

    en.wikipedia.org/wiki/Voicemail

    A message center or "message desk" was a centralized, manual answering service inside a company staffed by a few operators who answered all incoming phone calls. Extensions that were busy or rang "no answer" would forward to the message center using a device called a "call director".

  7. 30 Scam Phone Numbers To Block and Area Codes To Avoid - AOL

    www.aol.com/finance/19-dangerous-scam-phone...

    You can call 888-382-1222 or visit DoNotCall.gov to report spam calls, telemarketers or robo-callers. Are 877 numbers spam? 877 numbers are toll-free numbers often used by businesses and ...