Four-wire, half-rate architecture with embedded differential del

Multiplex communications – Communication techniques for information carried in plural... – Adaptive

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370536, 370516, H04T 306

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active

055984134

ABSTRACT:
To extend the transmission distance for basic rate integrated services digital network (ISDN) communications between a first site and a second site, the basic rate ISDN channel is demultiplexed onto a pair of half-rate digital subscriber loop channels, which employ an out of band maintenance channel to convey differential delay compensation information, but without modifying the framing structure of the transported channels, or requiring additional bandwidth for a separate framing channel. Halving the data rate, to increase the distance over which the basic rate ISDN channel may be transported, operates as a trade-off against loop loss, while still complying with ANSI standards.

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