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  2. Wireless intercom - Wikipedia

    en.wikipedia.org/wiki/Wireless_intercom

    A wireless intercom is a telecommunications device that enables voice communication without the need to run copper wires between intercom stations. A wired intercom system may incorporate wireless elements. There are many types of wireless intercom systems on the market. Most wireless intercom systems communicate by radio waves using one of the ...

  3. Digital coupon - Wikipedia

    en.wikipedia.org/wiki/Digital_coupon

    Digital coupons (also known as e-coupons, e-clips or clipped deals) are the digital analogue of paper coupons which are used to provide customers with discounts or gifts in order to attract the purchase of some products. Mostly, grocery and drug stores offer e-coupon services in loyalty program events. Even though there are still traditional ...

  4. FCC fines wireless carriers for sharing user locations ... - AOL

    www.aol.com/news/fcc-fines-wireless-carriers...

    The Federal Communications Commission has leveraged nearly $200 million in fines against wireless carriers AT&T, Sprint, T-Mobile and Verizon for illegally sharing customers' location data without ...

  5. Leap Wireless - Wikipedia

    en.wikipedia.org/wiki/Leap_Wireless

    Leap Wireless International, Inc. was a telecommunications operator that provided wireless services to approximately 4.6 million subscribers, the 5th largest, through its subsidiary, Cricket Communications, Inc. (Cricket Wireless). It was headquartered in San Diego, California. Leap Wireless and Cricket Wireless are now subsidiaries of AT&T .

  6. Wireless device radiation and health - Wikipedia

    en.wikipedia.org/wiki/Wireless_device_radiation...

    Since at least the 1990s, scientists have researched whether the now-ubiquitous radiation associated with mobile phone antennas or cell phone towers is affecting human health. [1] Mobile phone networks use various bands of RF radiation, some of which overlap with the microwave range. Other digital wireless systems, such as data communication ...

  7. List of WLAN channels - Wikipedia

    en.wikipedia.org/wiki/List_of_WLAN_channels

    Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.

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