Voice and data exchange over a packet based network with DTMF

Details Voice and data exchange over a packet based network with DTMF Voice and data exchange over a packet based network with DTMF

2006-07-25

2006-07-25

Nguyen, Brian (Department: 2661)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S352000, C379S283000

Reexamination Certificate

active

07082143

ABSTRACT:
A method and system for detecting a dual tone in a composite signal having first and second components including means for separating the composite signal into its first and second components, means for estimating power of the separated first and second components, means for determining frequency of the separated first and second components, and means for comparing the power and frequency of the first and second components to at least one of a plurality of respective power and frequency thresholds to determine whether the composite signal comprises a dual tone.

REFERENCES:
patent: 4285060 (1981-08-01), Cobb et al.
patent: 4617676 (1986-10-01), Jayant et al.
patent: 4689760 (1987-08-01), Lee et al.
patent: 5119322 (1992-06-01), Stroobach
patent: 5311578 (1994-05-01), Bremer et al.
patent: 5329587 (1994-07-01), Morgan et al.
patent: 5333191 (1994-07-01), McCarthy
patent: 5339384 (1994-08-01), Chen
patent: 5353346 (1994-10-01), Cox et al.
patent: 5388127 (1995-02-01), Scarpa
patent: 5416836 (1995-05-01), Marinelli et al.
patent: 5442694 (1995-08-01), Chitrapu et al.
patent: 5442696 (1995-08-01), Lindberg et al.
patent: 5452289 (1995-09-01), Sharma et al.
patent: 5454015 (1995-09-01), Olafsson
patent: 5471470 (1995-11-01), Sharma et al.
patent: 5491565 (1996-02-01), Naper
patent: 5519774 (1996-05-01), Battista et al.
patent: 5535271 (1996-07-01), Jangi et al.
patent: 5577041 (1996-11-01), Sharma et al.
patent: 5583933 (1996-12-01), Mark
patent: 5598468 (1997-01-01), Ammicht et al.
patent: 5600649 (1997-02-01), Sharma et al.
patent: 5694517 (1997-12-01), Sugino et al.
patent: 5764627 (1998-06-01), Sharma et al.
patent: 5790532 (1998-08-01), Sharma et al.
patent: 5790641 (1998-08-01), Chan et al.
patent: 5793498 (1998-08-01), Scholl et al.
patent: 5818929 (1998-10-01), Yaguchi
patent: 5852630 (1998-12-01), Langberg et al.
patent: 5859671 (1999-01-01), Kim
patent: 5949874 (1999-09-01), Mark
patent: 5970441 (1999-10-01), Mekuria
patent: 5987061 (1999-11-01), Chen
patent: 6023470 (2000-02-01), Lee et al.
patent: 6028679 (2000-02-01), Murphy
patent: 6125177 (2000-09-01), Whittaker
patent: 6141341 (2000-10-01), Jones et al.
patent: 6151636 (2000-11-01), Schuster et al.
patent: 6229889 (2001-05-01), Cannon et al.
patent: 6233226 (2001-05-01), Gringeri et al.
patent: 6259677 (2001-07-01), Jain
patent: 6370244 (2002-04-01), Felder et al.
patent: 6393124 (2002-05-01), Tsai et al.
patent: 6480589 (2002-11-01), Lee et al.
patent: 6549587 (2003-04-01), Li
patent: WO 97/26753 (1997-07-01), None
patent: WO 97/28628 (1997-08-01), None
R. W. Lucky,QAM Receiver I. General Description of Complete Receiver Block Diagram and Details of the Symbol Clock Recovery and Other Front-End Subsystems, Applications of Communications Theory, Chapter 13, pp. 127-135, Bellcore.
R. W. Lucky,QAM Receiver II. The Passband Adaptive Equalizer and Carrier Recovery System, Applications of Communications Theory, Chapter 14, pp. 137-151, Bellcore.
Edward A. Lee et al.,Adaptive Equalization, Digital Communication, Chapter 9, pp. 371-402.
Edward A. Lee et al.,Timing Recovery, Digital Communication, Chapter 15, pp. 560-582.
William Webb et al.,Basic Equaliser Techniques, Modern Quadrature Amplitude Modulation, Principles and Applications for Fixed and Wireless Communications, IEEE Press, New York, Chapter 7, pp. 197-211.
Mike Gray,FAX Technology Tutorial and Testing Issues, Agilent Technologies, © 2000, pp. 1-20.
FAX Over IP Opportunities and Options, Natural MicroSystems, 7 sheets.
Man Mohan Sondhi et al.,Silencing Echoes on the Telephone Network, Proceedings of the IEEE, © Aug. 1980, vol. 68, No. 8, pp. 948-963.
John G. Proakis,Digital Signaling Over a Channel With Intersymbol Interference, Digital Communications, ISBN 0-07-05097-1, © 1983, pp. 357-381, McGraw-Hill, Inc.
John A.C. Bingham,Timing Recovery, The Theory and Practice of Modem Design, © 1988, Chapter 7, pp. 189-236, John Wiley & Sons, Inc.
John A.C. Bingham,Linear Adaptive Equalizers, The Theory and Practice of Modem Design, © 1988, Chapter 8, pp. 237-252, John Wiley & Sons, Inc.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, General Aspects of Digital Transmission Systems, Terminal Equipments,Pulse Code Modulation (PCM) of Voice Frequencies, ITU-T Recommendation, G. 711; © ITU1988, 1993; 8 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, Transmission Systems and Media, Apparatus Associated With Long-Distance Telephone Circuits and Other Terminal Equipments,Echo Suppressors, ITU-T Recommendation, G. 164; © ITU 1988, 1993; 36 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, General Aspects of Digital Transmission Systems, Terminal Equipments,7 kHz Audio -Coding Within 64 Kbit/s, ITU Recommendation; G. 722; © ITU 1988, 1993; 76 sheets.
International Telecommunication Union, Data Communication Over The Telephone Network,1200 Bits Per Second Duplex Modem Standardized For Use In The General Switched Telephone Network And On Point-To-Point 2-Wire Leased Telephone-Type Circuits, ITU-T Recommendation V.22, © ITU 1988, 1993; 16 sheets.
International Telecommunication Union, Data Communication Over The Telephone Network,2400 Bits Per Second Duplex Modem Using The Frequency Division Technique Standardized For Use On The General Switched Telephone Network And On Point-To-Point 2-Wire Leased Telephone-Type Circuits, ITU-T Recommendation V.22 bis, © 1988, 1993; 18 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, Data Communication Over the Telephone Network,300 Bits Per Second Duplex Modem Standardized For Use in The General Switched Telephone Network, ITU-T Recommendation V. 21; ©ITU 1988, 1993; 7 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, Data Communication Over the Telephone Network,4800/2400 Bits Per Second Modem Standardized For Use in The General Switched Telephone Network, ITU-T Recommendation, V.27 ter, © ITU 1988, 1993; 15 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, Data Communication Over the Telephone Network,9600 Bits Per Second Modem Standardized For Use On Point-To-Point 4-Wire Leased Telephone-Type Circuits, ITU-T Recommendation, V. 29, © ITU 1988, 1993, 17 sheets.
Fuyun Ling et al.,Convergence and Steady-State Behavior of a Phase-Splitting Fractionally Spaced Equalizer, IEEE Transactions on Communications, © Apr. 4, 1990, vol. 38, No. 4, pp. 418-425, IEEE.
Paul Fischer,State Machines In C, The C Users Journal, Dec. 1990, pp. 119-122.
International Telecommunication Union, Data Communication Over The Telephone Network,A Duplex Modem Operating At Data Signalling Rates Of Up To 14 400 bit/s For Use On The General Switched Telephone Network And On Leased Point-To-Point 2-Wire Telephone-Type Circuits, ITU-T Recommendation V. 32 bis; © ITU 1991, 24 sheets.
International Telecommunication Union, CCITT The International Telegraph and Telephone Consultative Committee, Data Communication Over the Telephone Network,Data Compression Procedures For Data Circuit Terminating Equipment(DCE)Using Error Correction Procedures, ITU-T Recommendation, V.42 bis; © ITU 1990; 29 sheets.
International Telecommunication Union, CCITT The International Telegraph and Telephone Consultative Committee, General Aspects of Digital Transmission Systems; Terminal Equipments,40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation(ADPCM), ITU-T Recommendation, G.726; © 1990; 59 sheets.
International Telecommunication Union, CCITT The International Telegraph and Telephone Consultative Committee, General Aspects of Digital Transmission Systems; Terminal Equipments,5-, 4-, 3- And 2-bits Sample Embedded Adaptive Differential Pulse Code Modulation(ADPCM); Recommendation G. 727; © ITU 1990; 57 sheets.
International Telecommuication Union, CCITT- The International Telegraph and Te

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