Proceedings ArticleDOI
Application of high bit-rate digital subscriber line (HDSL) technology
T.J.J. Starr
- pp 283-288
TLDR
High bit-rate Digital Subscriber Line (HDSL) technology as discussed by the authors enables two-way 1.544 or 2.048 Mb/s transport over most existing copper telephone cables without repeaters, cable conditioning, or binder group segregation.Abstract:
High bit-rate Digital Subscriber Line (HDSL) technology permits two-way 1.544 or 2.048 Mb/s transport over most existing copper telephone cables without repeaters, cable conditioning, or binder group segregation. Approximately 1000 HDSLs are now in service, and the rate of deployment is accelerating. Compared with traditional high speed copper transport systems, HDSL engineering, installation, and maintenance are simpler. Non-intrusive measurement of Signal-to-Noise Ratio (SNR) and digital performance greatly improves the HDSL's utility. HDSL permits rapid and low-cost service turn-up for private line DS1, fractional DSI rate, switched services, and access to PCS base stations. A strong synergy exists between HDSL and the fiber deployments planned for the next several years.read more
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Journal ArticleDOI
The World’s Technological Capacity to Store, Communicate, and Compute Information
Martin Hilbert,Priscila López +1 more
TL;DR: An inventory of the world’s technological capacity from 1986 to 2007 reveals the evolution from analog to digital technologies, and the majority of the authors' technological memory has been in digital format since the early 2000s.
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