Method and system for combining symmetric DSL signals and voice signals
First Claim
1. An apparatus for communicating telephony voice signals with symmetric digital subscriber line (SDSL) signals, comprising:
- a combiner including a first port configured to receive a telephony voice signal, a second port configured to receive an SDSL signal, a third port configured to be coupled to a single communication medium to enable the simultaneous transmission of the voice and SDSL signals over the single communication medium, and circuitry configured to process the telephony voice signal and SDSL signal to attenuate at least a portion of partially interfering signals that exist in an overlap frequency range.
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Accused Products
Abstract
This invention provides a simplified communication system that transmits voice and SDSL signals between customer premise equipment (“CPE”) on a single twisted-pair line. The system preferably includes at least one combiner for combining voice and SDSL signals into a combined voice/SDSL signal that can be transmitted to the CPE on a single twisted pair of wires, preferably a pair of wires currently being used to transmit the voice signal to the CPE. One combiner is ideally located at a common wiring closet of the building where the CPE is located. The combiner is ideally coupled to the existing pair of wires for the voice signal. This eliminates the need to add another set of wires between the common wiring closet and the CPE for the SDSL signal. A second combiner, normally located at or near the CPE separates the combined voice/SDSL signal into the separate voice and SDSL signals for processing by the CPE. The second and first combiners normally also combine and separate, respectively, the voice and SDSL signals transmitted from the CPE.
8 Citations
25 Claims
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1. An apparatus for communicating telephony voice signals with symmetric digital subscriber line (SDSL) signals, comprising:
a combiner including a first port configured to receive a telephony voice signal, a second port configured to receive an SDSL signal, a third port configured to be coupled to a single communication medium to enable the simultaneous transmission of the voice and SDSL signals over the single communication medium, and circuitry configured to process the telephony voice signal and SDSL signal to attenuate at least a portion of partially interfering signals that exist in an overlap frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for communicating telephony voice signals with digital data symmetric digital subscriber line (SDSL) signals, comprising:
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a voice signal port configured to receive a telephony voice signal; an SDSL signal port configured to receive an SDSL signal; a combined voice/SDSL signal port configured to be coupled to a two-wire communication line; a voice signal filtering section coupled to said voice signal port and to said combined voice/SDSL signal port, said voice signal filtering section including a low pass filter having a cutoff frequency higher than an upper frequency spectrum of the telephony voice signal during steady state conditions and being configured to attenuate a frequency spectrum of the voice signal above a first predetermined frequency; and an SDSL signal filtering section coupled to said SDSL signal port and to said combined voice/SDSL signal port, said SDSL filtering section including a high pass filter having a cutoff frequency higher than the cutoff frequency of the low pass and being configured to attenuate a frequency spectrum of the SDSL signal below a second predetermined frequency; wherein the apparatus enables simultaneous reception of telephony voice and SDSL signals via said voice signal and SDSL signal ports, respectively, and transmission of combined voice and SDSL signals via a two-wire communication line coupled to said combined voice/SDSL signal port; and
wherein the apparatus further enables reception of combined voice and SDSL signals via said two-wire communication line and transmission of voice and SDSL signals via the voice and SDSL signal ports, respectively. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for communicating a telephony voice signal and a symmetric digital subscriber line (SDSL) signal on a single combined line, where the frequency spectrum of the telephony voice signal during steady state conditions and the frequency spectrum of the SDSL signal may overlap, and where the telephony voice signal may include a plurality of transients during non-steady state conditions, the method comprising:
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receiving a telephony voice signal; receiving an SDSL signal; processing said telephony voice signal with a low pass filter having a cutoff frequency higher than an upper frequency spectrum of the telephony voice signal during steady state conditions to attenuate a frequency spectrum of the voice signal above a first predetermined frequency; processing said SDSL signal with a high pass filter having a cutoff frequency higher than the cutoff frequency of the low pass to attenuate a frequency spectrum of the SDSL signal below a second predetermined frequency; and transmitting combined voice and SDSL signals to a remote location via a two-wire communication line. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification