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Transmission Improvements in Two-Wire Switching Systems

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1 Author(s)
Clark, R. ; Automatic Electric Labs., Inc.,Northlake, IL

Customer distant dialing without operator intervention is predicated on rapid dependable switching and high-quality transmission with minimum contrast from call to call. It is, therefore, mandatory that each incremental unit in each built-up connection follow the best and latest design practice and be subjected to a rigid preventive maintenance program. This paper will discuss some recent changes in two-wire switching circuits to obtain improvements in transmission following the basic guidelines of the "Notes on Distance Dialing" ("Blue Book," AT&T) and bulletins released by the various United States Independent Telephone Association (USITA) committees.

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Communication Technology, IEEE Transactions on  (Volume:18 ,  Issue: 3 )