Abstract
The demand for relatively-long exchange trunk circuits has created a need for a carrier system suitable for this specialized function. A basic requirement for such a system is that it may be operated over existing exchange trunk cables. This paper discusses the results of tests conducted to determine the range of attenuation, crosstalk coupling loss, and noise liable to be encountered on existing cables. It also shows how the observed values were used in the design of the NX-1 Exchange Trunk Carrier System.
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Schedule a callMore From: Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics
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