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  2. Triggerfish (surveillance) - Wikipedia

    en.wikipedia.org/wiki/Triggerfish_(surveillance)

    Neither the user nor the cell phone provider need to know about Triggerfish for it to be used successfully. [2] A court order is required, but the device circumvents provisions of CALEA barring use of pen register or trap-and-trace devices.

  3. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    Some small VOIP operators also cannot call toll free numbers. For example, 0701-xxx-xxx cannot call toll free numbers directly, but can call through a live operator by dialling "123" and have them redirect the call. In Thailand, for the Call Free, Free Call, Toll-Free, or Free Phone service, the format used is "1800-xxxxxx". Calls are free for ...

  4. Pocket dialing - Wikipedia

    en.wikipedia.org/wiki/Pocket_dialing

    Pocket dialing primarily occurs with touch phones and open phones. Typically, a call is caused by the person's movement changing the shape of the pocket in a person's clothing in such a way that a small amount of pressure is applied to some of the buttons, or in the case of a touch screen phone, a call can also be caused by the screen of the ...

  5. Call tracing - Wikipedia

    en.wikipedia.org/wiki/Call_tracing

    In telecommunication, call tracing is a procedure that permits an entitled user to be informed about the routing of data for an established connection, identifying the entire route from the origin to the destination. There are two types of call tracing. Permanent call tracing permits tracing of all calls.

  6. 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 ...

  7. Pen register - Wikipedia

    en.wikipedia.org/wiki/Pen_register

    The time the call was made; Whether the call was answered, or went to voice-mail; The length of each call; Content of SMS text messages; Post-cut-through dialed digits--(digits dialed after call is connected, like banking personal identification number (PIN) or prescription refill numbers) The real-time location of a cell phone to within a few ...

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