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  2. Wireless intercom - Wikipedia

    en.wikipedia.org/wiki/Wireless_intercom

    A wireless intercom is a ... Wired intercom is inherently private, so long as the wiring system isn't tapped by outside parties. ... in the 2.4 GHz range, a wireless ...

  3. HH-47 CSAR-X prototype - Wikipedia

    en.wikipedia.org/wiki/HH-47_CSAR-X_Prototype

    An improved wireless intercom was also a primary target for Boeing. [1] This meant that the HH-47 was uniquely suited to long range combat search and rescue (CSAR) operations, a capability that was lacking in the Air Force's opinion. After the initial approval, four prototypes were to be designed, with 141 to be built over the next five years ...

  4. Long-range Wi-Fi - Wikipedia

    en.wikipedia.org/wiki/Long-range_Wi-Fi

    Long-range Wi-Fi is used for low-cost, unregulated point-to-point computer network connections, as an alternative to other fixed wireless, cellular networks or satellite Internet access. Wi-Fi networks have a range that's limited by the frequency, transmission power, antenna type, the location they're used in, and the environment. [ 1 ]

  5. Intercoms: A History of Distance - AOL

    www.aol.com/news/intercoms-history-distance...

    From analog to digital to the cloud, how have production crew communications evolved? Clear-Com's Simon Browne takes us on a tour of the evolution of the intercom system.

  6. WiMAX - Wikipedia

    en.wikipedia.org/wiki/WiMAX

    The original version of the standard on which WiMAX is based (IEEE 802.16) specified a physical layer operating in the 10 to 66 GHz range. 802.16a, updated in 2004 to 802.16-2004, added specifications for the 2 to 11 GHz range. 802.16-2004 was updated by 802.16e-2005 in 2005 and uses scalable orthogonal frequency-division multiple access [18 ...

  7. Long-range optical wireless communication - Wikipedia

    en.wikipedia.org/wiki/Long-range_optical...

    Long-range optical wireless communication or free-space optical communication (FSO) is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking over long distances. "Free space" means air, outer space, vacuum, or something similar.

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