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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 ...
Electromagnetic interference ( EMI ), also called radio-frequency interference ( RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction. [1] The disturbance may degrade the performance of the circuit or ...
Mobile phone signal. A mobile phone signal (also known as reception and service) is the signal strength (measured in dBm) received by a mobile phone from a cellular network (on the downlink ). Depending on various factors, such as proximity to a tower, any obstructions such as buildings or trees, etc. this signal strength will vary.
Cliff effect. In telecommunications, the (digital) cliff effect or brick-wall effect is a sudden loss of digital signal reception. Unlike analog signals, which gradually fade when signal strength decreases or electromagnetic interference or multipath increases, a digital signal provides data which is either perfect or non-existent at the ...
Intercept message. An intercept message is a telephone recording informing the caller that the call cannot be completed, for any of a number of reasons ranging from local congestion, to disconnection of the destination phone, number dial errors or network trouble along the route.
Supervision (telephony) In telecommunication, supervision is the monitoring of a telecommunication circuit for telephony to convey to an operator, user, or a switching system, information about the operational state of the circuit. The typical operational states of trunks and lines are the idle and busy states, seizure, and disconnect. [1]
WASHINGTON (Reuters) -The U.S. Treasury on Monday announced a major expansion of its security review authority over foreign purchases of real estate near American military bases, adding a net ...
Many Korean Americans in Los Angeles refer to the event as 'Sa-I-Gu', meaning "four-two-nine" in the Korean language (4.29), in reference to April 29, 1992, which was the day the riots started. Over 2,300 mom-and-pop shops run by Korean business owners were damaged through ransacking and looting during the riots, sustaining close to $400 ...