Combined analog and digital communications device
First Claim
1. A communications device, comprising:
- a first connector adapted for coupling to a POTS telephone line;
a second connector adapted for coupling to an ISDN telephone line and configured to provide an ISDN U interface;
a third connector adapted for coupling to an ISDN telephone line and configured to provide an ISDN S/T interface; and
a digital signal processing (DSP) core, wherein the digital signal processing core is configured to perform;
analog modem functions when the first connector is coupled to a POTS telephone line;
ISDN signal processing functions and ISDN S/T and U interface functions when the second connector is coupled to an ISDN telephone line;
ISDN signal processing functions and ISDN S/T interface functions when the third connector is coupled to an ISDN telephone line; and
a digital data path multiplexer operably coupled between the DSP core and the first, second, and third connectors, wherein the digital data path multiplexer includes autosense logic which monitors signals received from a telephone line connected to one of the first, second, and third connectors, and wherein the autosense logic determines a data transfer mode based upon the received signals, and wherein the autosense logic provides information regarding the determined data transfer mode to the DSP core, and wherein the DSP core receives the information regarding the determined data transfer mode and performs operations according to the determined data transfer mode.
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Accused Products
Abstract
A communications device is presented which is configured to provide selective signal processing at a "plain old telephone service" (POTS) interface, an ISDN U interface, or an ISDN S/T interface. A first POTS connector allows the communications device to be connected to an analog POTS telephone line. A second ISDN U connector allows the communications device to be connected to an ISDN network at an ISDN U interface point. A third ISDN S/T connector allows the communications device to be connected to an ISDN network at an ISDN S/T interface point. A digital signal processing (DSP) core performs: (i) analog modem functions via analog modem emulation when a POTS telephone line is connected to the POTS connector, or (ii) ISDN digital voice and data processing functions along with ISDN S/T and U interface functions when an ISDN line is connected to the ISDN U connector, or (iii) ISDN digital voice and data processing functions along with ISDN S/T interface functions when an ISDN line is connected to the ISDN S/T connector. Interface logic couples signals between the DSP core and the connectors. A digital data path multiplexer coupled between the DSP core and the interface logic includes "autosense" logic which monitors signals received by the connector coupled to the telephone line and determines a data transfer mode based upon the received signals. The digital data path multiplexer provides the data transfer mode information to the DSP core, and the DSP core performs communications operations according to data transfer mode information.
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Citations
29 Claims
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1. A communications device, comprising:
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a first connector adapted for coupling to a POTS telephone line; a second connector adapted for coupling to an ISDN telephone line and configured to provide an ISDN U interface; a third connector adapted for coupling to an ISDN telephone line and configured to provide an ISDN S/T interface; and a digital signal processing (DSP) core, wherein the digital signal processing core is configured to perform; analog modem functions when the first connector is coupled to a POTS telephone line; ISDN signal processing functions and ISDN S/T and U interface functions when the second connector is coupled to an ISDN telephone line; ISDN signal processing functions and ISDN S/T interface functions when the third connector is coupled to an ISDN telephone line; and a digital data path multiplexer operably coupled between the DSP core and the first, second, and third connectors, wherein the digital data path multiplexer includes autosense logic which monitors signals received from a telephone line connected to one of the first, second, and third connectors, and wherein the autosense logic determines a data transfer mode based upon the received signals, and wherein the autosense logic provides information regarding the determined data transfer mode to the DSP core, and wherein the DSP core receives the information regarding the determined data transfer mode and performs operations according to the determined data transfer mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A communications device, comprising:
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a first connector adapted for coupling to a POTS telephone line; a second connector adapted for coupling to an ISDN telephone line and configured to provide an ISDN U interface; a third connector adapted for coupling to an ISDN telephone line and configured to provide an ISDN S/T interface; a digital signal processing (DSP) core, wherein the DSP core is configured to perform; analog modem functions in an analog transfer mode; ISDN signal processing functions along with ISDN S/T and U interface functions during an ISDN U transfer mode; and ISDN signal processing functions and ISDN S/T interface functions during an ISDN S/T transfer mode; a digital data path multiplexer coupled to the DSP core, wherein the digital data path multiplexer includes autosense logic determines a data transfer mode, and wherein the data transfer mode is; the analog transfer mode when the first connector is coupled to a POTS telephone line; the ISDN U transfer mode when the second connector is coupled to an ISDN telephone line; and the ISDN S/T transfer mode functions when the third connector is coupled to an ISDN telephone line; a memory unit coupled to the DSP core and configured to store programs and data; and interface logic, wherein the interface logic is coupled between the digital data multiplexer and the first, second, and third connectors, and wherein the interface logic receives digital signals produced by the DSP core, produces output signals, and provides the output signals to; the first connector when the first connector is coupled to a POTS telephone line; the second connector when the second connector is coupled to an ISDN telephone line; and the third connector when the third connector is coupled to an ISDN telephone line. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A communications device, comprising:
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a first connector adapted for coupling to a POTS telephone line; a second connector adapted for coupling to an ISDN telephone line and configured to provide an ISDN U interface; a third connector adapted for coupling to an ISDN telephone line and configured to provide an ISDN S/T interface; a digital signal processing (DSP) core, wherein the DSP core is configured to perform analog modem functions in an analog transfer mode, and wherein the DSP core is configured to perform ISDN signal processing functions along with ISDN S/T and U interface functions during an ISDN U transfer mode, and wherein the DSP core is configured to perform ISDN signal processing functions and ISDN S/T interface functions during an ISDN S/T transfer mode; a digital data path multiplexer coupled to the DSP core, wherein the digital data path multiplexer includes autosense logic which monitors signals received from a telephone line connected to one of the first, second, and third connectors, and wherein the autosense logic determines a data transfer mode, and wherein the data transfer mode is; the analog transfer mode when signals are received from the first connector; the ISDN U transfer mode when signals are received from the second connector; and the ISDN S/T transfer mode when signals are received from the third connector; a memory unit coupled to the DSP core and configured to store programs and data; and interface logic, wherein the interface logic is coupled between the digital data multiplexer and the first, second, and third connectors, and wherein the interface logic receives digital signals produced by the DSP core, produces output signals, and provides the output signals to; the first connector when the first connector is coupled to a POTS telephone line; the second connector when the second connector is coupled to an ISDN telephone line; and the third connector when the third connector is coupled to an ISDN telephone line.
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Specification