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  2. Mass surveillance in the United States - Wikipedia

    en.wikipedia.org/wiki/Mass_surveillance_in_the...

    This report came on the heels of allegations that the U.S. government had been conducting electronic surveillance of domestic telephone calls without warrants. [ 118 ] Law enforcement and intelligence services in the United States possess technology to remotely activate the microphones in cell phones in order to listen to conversations that ...

  3. Government Emergency Telecommunications Service - Wikipedia

    en.wikipedia.org/wiki/Government_Emergency...

    GETS supports federal, state, local, and tribal government, industry, and non-governmental organization personnel during crisis or emergencies by providing emergency access and priority processing for local and long-distance telephone calls on the public switched telephone network.

  4. Long-distance calling - Wikipedia

    en.wikipedia.org/wiki/Long-distance_calling

    In telecommunications, a long-distance call (U.S.) or trunk call (also known as a toll call in the U.K. [citation needed]) is a telephone call made to a location outside a defined local calling area. Long-distance calls are typically charged a higher billing rate than local calls.

  5. Telephone numbering plan - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbering_plan

    When dialing a telephone number, the area code may have to be preceded by a trunk prefix or national access code for domestic calls, and for international calls by the international access code and country code. Area codes are often quoted by including the national access code. For example, a number in London may be listed as 020 7946 0321.

  6. From the archives | NSA has massive database of Americans ...

    www.aol.com/news/archives-nsa-massive-database...

    The spy agency is using the data to analyze calling patterns in an effort to detect terrorist activity, sources said.

  7. Wide Area Telephone Service - Wikipedia

    en.wikipedia.org/wiki/Wide_Area_Telephone_Service

    A form of toll-free telephone service in North America was the Zenith number, published in distant cities from where a company expected or desired frequent customer calls. Published as "Zenith" and a four- or five-digit number, these collect calls required operator assistance. The subscriber of the service was charged for the call.

  8. US government tells officials, politicians to ditch regular ...

    www.aol.com/news/us-government-tells-officials...

    WASHINGTON (Reuters) -The U.S. government is urging senior government officials and politicians to ditch phone calls and text messages following intrusions at major American telecommunications ...

  9. Terrorist Surveillance Program - Wikipedia

    en.wikipedia.org/wiki/Terrorist_Surveillance_Program

    However, anonymous sources have come forward stating a small number of instances where purely domestic calls were intercepted. These sources said the NSA accidentally intercepted these calls, apparently caused by technical glitches in determining whether a communication was in fact "international", probably due to the use of international cell ...