Every three years, the National Electrical Code (NEC) is updated, and the industry simultaneously reacts with excitement, ...

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Abstract: In a majority of European countries a digital trunking TETRA system is used for Public Safety communication. This system offer voice communication and narrowband data services only. Since ...

Abstract: Present toll trunk traffic engineering practices in the United States are reviewed, and various congestion formulas compared with data obtained on long distance traffic. Customer habits upon ...