Hitless modem pool expansion at steady state

Details Hitless modem pool expansion at steady state Hitless modem pool expansion at steady state

2003-12-11

2009-11-03

Tran, Khai (Department: 2611)

Pulse or digital communications

Transceivers

Modems

Reexamination Certificate

active

07613235

ABSTRACT:
In a communications system having a first modem transmitting via a communications channel, a method for adding a second modem, the method including learning crosstalk caused by transmissions from the first modem to the second modem while the second modem is in a transmitting state insufficient to cause crosstalk interference to the first modem in accordance with a predefined measure, deriving from the learned crosstalk an estimation of crosstalk that would be caused by the second modem to the first modem when the second modem is in a transmitting state, configuring the first modem to cancel crosstalk according to the crosstalk estimation, causing the second modem to enter a transmitting state sufficient to cause crosstalk interference to the first modem in accordance with a predefined measure, and causing the first modem to at least partially cancel crosstalk caused by the second modem in accordance with the crosstalk estimation.

REFERENCES:
patent: 5970088 (1999-10-01), Chen
patent: 7027537 (2006-04-01), Cheong et al.
patent: 7187711 (2007-03-01), Kantschuk et al.
patent: 2003/0137925 (2003-07-01), Zamir

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