Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2006-08-14
2008-10-28
Duong, Frank (Department: 2616)
Multiplex communications
Duplex
Transmit/receive interaction control
C375S345000, C379S388030
Reexamination Certificate
active
07443812
ABSTRACT:
A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the switched circuit network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the switched circuit network for transmission on the packet based network, and modulating data signal packets from the packet based network for transmission on the switched circuit network. The call discriminator is used to selectively enable the voice exchange and data exchange.
REFERENCES:
patent: 4285060 (1981-08-01), Cobb et al.
patent: 4499578 (1985-02-01), Marouf et al.
patent: 4617676 (1986-10-01), Jayant et al.
patent: 5119322 (1992-06-01), Stroobach
patent: 5274705 (1993-12-01), Younce et al.
patent: 5329587 (1994-07-01), Morgan et al.
patent: 5339384 (1994-08-01), Chen
patent: 5353346 (1994-10-01), Cox et al.
patent: 5388127 (1995-02-01), Scarpa
patent: 5396488 (1995-03-01), Lahdemaki
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: 5535271 (1996-07-01), Jangi et al.
patent: 5563944 (1996-10-01), Hasegawa
patent: 5577041 (1996-11-01), Sharma et al.
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: 5867574 (1999-02-01), Eryilmaz
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: 6169971 (2001-01-01), Bhattacharya
patent: 6233226 (2001-05-01), Gringeri et al.
patent: 6259677 (2001-07-01), Jain
patent: 6453289 (2002-09-01), Ertem et al.
patent: 6504838 (2003-01-01), Kwan
patent: 6549587 (2003-04-01), Li
patent: 6757367 (2004-06-01), Nicol
patent: 6967946 (2005-11-01), Tackin et al.
patent: 6980528 (2005-12-01), LeBlanc et al.
patent: 6987821 (2006-01-01), Li
patent: 6990195 (2006-01-01), LeBlanc et al.
patent: 7082143 (2006-07-01), LeBlanc et al.
patent: 7161931 (2007-01-01), Li et al.
patent: 7180892 (2007-02-01), Tackin
patent: WO 97/26753 (1997-07-01), None
patent: WO 97/28628 (1997-08-01), None
ZARLINK-Acoustic Echo Canceller, downloadable from Mitel Semiconductor, pp. 1-29, Feb. 1999.
U.S. Appl. No. 09/533,022, filed Mar. 3, 2002, Wilf Le Blanc et al.
International Telecomminication Union, Iyu-T Telecommunication Standardization Sector of ITU, Series G: Transmission Systems and Media, Digital Systems and Networks, Automatic Level Control Deivces; ITU-T Recommendation G.169; © ITU 1999; pp. 1-52.
Series G: Transmission Systems and Media, Digital Systems and Network, Automatic Level Control Devices, Jun. 1999, pp. 1-52, Recommendation G. 169, International Telecommunication Union.
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 Equalizer techniques, Modern Quadrature Amplitude Modulation, Principles and Applications For Fixed And Wireless Communications, IEEE Press, New York, Cahpter 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.
EIA/TIA-464-B, Requirements for Private Branch Exchang (PBX) Switching Equipment, “6 Signaling Requirements, 6.1 Network Signaling-Analog-Analog,” pp. 140-146.
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.
Bell Communications Research, Dual-Tone Multifrequency Receiver Generic Requirements for End-to-End Signaling Over Tandem-Switched Voice Links, © Mar. 1987, Technical Reference TR-TSY-000181 Issue 1, 11 sheets.
Bell Communications Research, Impulse Noise Tape No. 201, Technical Reference TR-TSY-000762 Issue 1, © Jul. 1987, 4 sheets.
Bell Communications Research, Digit Simulation Tape No. 201, Technical Reference TR-TSY-000763 Issue 1, © Jul. 1987, 6 sheets.
John A. C. Bingham, Timing Recovery, The Theory and Practice of Modern Design, © 1988, Chapter 7 , pages 189-236, John Wiley & Sons, Inc.
John A. C. Bingham, Linear Adaptive Equalizers, The Theory and Practice of Modern Design, © 1988, Chapter 8, pp. 237-252, John Wiley * Sons, Inc.
International Telecommunications 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 Telecommunications 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; © ITU1988, 1993; 36 sheets.
ernational Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, General Aspects of Digital Transmission Systems, terminal Equipments, 7kHz Audio-Coding Within 64Kbits/s, ITU Recommendation; G. 722; © ITU 1988, 1993; 76 sheets.
International Telecommunication Union, ITU-T Telecommunications Standardization Sector of ITU, General Recommendations On Telephone Switching and Signaling, International Automatic and Semi-Automatic Working, Technical Features of Push-Button Telephone Sets, ITU-T Recommendation; Q 23; © ITU 1988, 1993, 4 sheets.
International Telecommunication Union, ITU-T Telecommunications Standardization Sector of ITU, General Recommendations on Telephone Switching and Signaling, International Automatic and Semi-Automatic Working, Multifrequency Push-button Signal Reception, ITU-T Recommendation; Q 24; © ITU 1988, 1993, 7 sheets.
International Telecommunication Union, ITU-T Telecommunications Standardization Sector If ITU, Data Communication Over the Telephone Network, 300 Bits Per Second Duplex Modern Standardized For Use In the General Switched Telephone Network ITU-T Recommendation V. 21; © ITU 1988, 1993, 7 sheets.
International Telecommunication Union, Data Communication Over The Telephone Network, 1200 Bits Per Second Duplex Modern 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, © ITU 1988, 1993, 16 sheets.
International Telecommunication Union, Data Communication Over The Telephone Network, 2400 Bits Per Second Duplex Modern Using The Frequency Divison Technique Standardized For Use On The General Switched Telephone Network And On Point-To Point
Branden Scott
Griffiths Chad
LeBlanc Wilf
Tackin Onur
Broadcom Corporation
Duong Frank
McAndrews Held & Malloy Ltd.
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