Apparatus and method for communicating voice and data...

Details Apparatus and method for communicating voice and data... Apparatus and method for communicating voice and data...

2006-10-31

2006-10-31

Vo, Don N. (Department: 2611)

Pulse or digital communications

Transceivers

Modems

C370S468000, C370S493000, C379S399010

Reexamination Certificate

active

07130338

ABSTRACT:
Systems and methods are provided for communicating data over a subscriber loop using a modem. One such method includes: transmitting data on the loop in a first frequency band; sensing an indication that simultaneous transmission on the loop in a POTS frequency band is imminent; and adjusting transmit power in the first band, in response to the sensing step. One such system includes an input/output connection in communication with the loop, a processor operable in at least two states, a means for sensing demand for simultaneous usage of the loop, and a means for controlling the state. The first state is characterized by a first transmit power spectrum in the first band. The second state is characterized by a second transmit power spectrum in the first band, reduced relative to the first spectrum. Upon sensing demand, the control means causes the processor to operate in the second state.

REFERENCES:
patent: 4685129 (1987-08-01), Gavrilovich
patent: 5400322 (1995-03-01), Hunt et al.
patent: 5878077 (1999-03-01), Betts
“Multicarrier Modulation for Data Transmission: An Idea Whose Time Has Come” by John A.C. Bingham, Published May 1990 in IEEE Communications Magazine.

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