System and method for improving modem transmission through...

Details System and method for improving modem transmission through... System and method for improving modem transmission through...

2006-04-04

2006-04-04

Pezzlo, John (Department: 2662)

Multiplex communications

Duplex

Transmit/receive interaction control

C370S292000, C379S406010, C379S406100

Reexamination Certificate

active

07023812

ABSTRACT:
A modem including an echo canceller adapted to determine locations of far-end echo sources. The echo canceller is adapted to send a signal to turn off network echo suppressors and enter a training mode. A training signal at a predetermined modem training frequency is sent from the modem to the second modem in the link. The return signal is then sampled by the sending modem. Any far-end echoes manifest themselves as sine waves at the modem training frequency, delayed in time. The time difference between the peak of the training signal and the echo signals is used to determine the echo delay.

REFERENCES:
patent: 4970715 (1990-11-01), McMahan
patent: 4995030 (1991-02-01), Helf
patent: 5280473 (1994-01-01), Rushing et al.
patent: 5283815 (1994-02-01), Chennakeshu et al.
patent: 5353305 (1994-10-01), Fukuda et al.
patent: 5504810 (1996-04-01), McNair
patent: 5515398 (1996-05-01), Walsh et al.
patent: 5682378 (1997-10-01), Betts et al.
patent: 5761638 (1998-06-01), Knittle et al.
patent: 5790658 (1998-08-01), Yip et al.
patent: 5909384 (1999-06-01), Tal et al.
patent: 6317419 (2001-11-01), Olafsson et al.
patent: 6377683 (2002-04-01), Dobson et al.
patent: 6480532 (2002-11-01), Vareljian

Affiliated with

Also associated with

Rating

System and method for improving modem transmission through... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for improving modem transmission through..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for improving modem transmission through... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3587135