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Generic Requirements for ISDN Basic Access Digital Subscriber Lines


Document Number TR-NWT-000393
Issue Number 02
Issue Date Jan 1991
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    ABSTRACT: This document replaces TR-TSY-000393.

    A Digital Subscriber Line (DSL) is a technology that allows digital access to customers over the present, in-place, two-wire loop
    plant. The driving force behind the development of DSLs is the need to provide "Basic Access" digital service to customers as part of
    Integrated Services Digital Network (ISDN). The current telephone environment, including bridged taps and mixed wire gauge loops,
    intended for voice frequency transmission, presents a complex environment for wideband transmission. Furthermore, requirements are
    necessary for new transmission equipment that accommodate ISDN Basic Access services and that protect the quality of old services.

    This Technical Reference (TR) presents the view of Telcordia on generic technical requirements for DSL transmission technology that
    will operate in the environment mentioned above.

    When using TR-NWT-000393, you may need to refer to GR-63, TR-NWT-000397, and GR-499.

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