Quarter-rate 2B1Q ISDN architecture with embedded differential d

Details Quarter-rate 2B1Q ISDN architecture with embedded differential d Quarter-rate 2B1Q ISDN architecture with embedded differential d

1996-11-07

1999-08-17

Olms, Douglas W.

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

370274, 370492, 370501, 370536, H04J 316

Patent

active

059404035

ABSTRACT:
The transmission distance for DDS subscriber lines over a repeaterless four-wire link is extended to customer premises beyond the standard four-wire loop range of approximately 18 kft (56 kbps, 56 kbps with secondary channel capability, and 64 kbps) by employing commercially available ISDN transceiver chip hardware to multiplex a DDS data channel into quarter-rate (2B1Q) ISDN channels. At least one of a signalling channel and an out-of-band maintenance channel is used to convey differential delay compensation information, without modifying the framing structure of the transported channels, or requiring additional bandwidth for a separate framing channel.

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