Combination conventional telephony and high-bit-rate digital cha

Details Combination conventional telephony and high-bit-rate digital cha Combination conventional telephony and high-bit-rate digital cha

1996-12-03

1999-11-09

Olms, Douglas W.

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via frequency channels

370497, 370480, H04J 102

Patent

active

059827858

ABSTRACT:
The symmetrical Cu double lead line is asymmetrically terminated by two digital signal high-pass filters, one thereof at the exchange side being formed with a high-pass filter of the 4th order and the other thereof at the subscriber side being formed with a high-pass filter of the 1st order having a limit frequency of about 0.1.multidot.f.sub.Baud and a high-pass filter of the 2nd order. A high-pass of the 2nd or, respectively, 4th order has a limit frequency of about 100 kHz or with a limit frequency of about 30 kHz given employment of a separate 16 kHz band-stop filter.

REFERENCES:
patent: 5687229 (1997-11-01), Sih
patent: 5757803 (1998-05-01), Russell et al.
patent: 5781728 (1998-07-01), Rybicki et al.
ITG-Fachtagung "Zukunft der Kommunikationsnetze", dated Dec. 14, 1995, pp. 87-96.
Ein Modell Fur den VHDSL-Kanal, Schmucking et al, vol. 2/1996, ntz, pp. 20-27.

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