The two officers communicate via wireless headset.

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They also have wireless chips that will use the ZigBee standard, a sort of longer-range version of Bluetooth, to communicate with a future generation of wireless appliances and thermostats.

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In 15 years' time, when everything from shoes to shirts to sunglasses could well contain tiny wireless chips, people may use their phones to communicate with objects as well as talking to people, suggests Mr Lindoff.

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Damage to phone lines and wireless networks has made it difficult for aid agencies to communicate with each other and with the United Nations, which is in charge of coordinating relief efforts.

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In January of last year, cybersecurity researcher Travis Goodspeed gave a presentation at the S4 conference in Miami where he described a way to bypass encryption on Zigbee wireless chips, which some smart electric metering systems would use to communicate.

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Ericsson's Screen Phone, which runs the open-source Linux operating system, combines both Internet access and a speaker phone, and will communicate with a home base station using the emerging Bluetooth technology for wireless personal area networking.

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The law also enabled the formation of a nationwide interoperable wireless network for our first responders, so that police, fire, and rescue agencies can communicate with each other seamlessly across state and local boundaries, with spectrum allocated to public safety spectrum being made available to commercial providers when not in use by first responders.

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