Abstract
The DSL and HDSL environments depend upon the physical and electrical constraints of the loops and their ultimate digital capacity. Some of the typical subscriber loop environments are presented in Chapter 5. The BRISDN services are expected to be made available over all telephone lines (without load coils and range extension devices) and their statistics are presented in Chapter 5. The PRISDN services are expected to be available to all CSA type of customers and their loop statistics are also presented in Chapter 5. Even though the simulations indicate that a single wire-pair is not able to carry T1 and E1 rate data over every HDSL CSA type (US) loops in the presence of crosstalk (typical of current Central Offices), there is good reason to believe that the dual duplex systems (i.e., two wire-pairs carrying half rate data in the duplex mode) will be satisfactory even for the most adverse loops. In this Chapter, the total operating environments for the DSL and HDSL including the electrical aspects in the design considerations are presented.
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Ahamed, S.V., Lawrence, V.B. (1997). Operational Environment for the HDSL. In: Design and Engineering of Intelligent Communication Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-6291-7_6
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DOI: https://doi.org/10.1007/978-1-4615-6291-7_6
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