DE69432389D1 - Vorwärtsruf- und Rückrufsignalisierung für ein rechnerbasiertes persönliches Mehrzweckkommunikationssystem - Google Patents

Vorwärtsruf- und Rückrufsignalisierung für ein rechnerbasiertes persönliches Mehrzweckkommunikationssystem

Info

Publication number
DE69432389D1
DE69432389D1 DE69432389T DE69432389T DE69432389D1 DE 69432389 D1 DE69432389 D1 DE 69432389D1 DE 69432389 T DE69432389 T DE 69432389T DE 69432389 T DE69432389 T DE 69432389T DE 69432389 D1 DE69432389 D1 DE 69432389D1
Authority
DE
Germany
Prior art keywords
voice
data
remote
telephone
over
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69432389T
Other languages
English (en)
Inventor
Ping Li
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multi Tech Systems Inc
Original Assignee
Multi Tech Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Multi Tech Systems Inc filed Critical Multi Tech Systems Inc
Application granted granted Critical
Publication of DE69432389D1 publication Critical patent/DE69432389D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/064—Data transmission during pauses in telephone conversation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
    • H04L27/3416—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/04—Protocols for data compression, e.g. ROHC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/247—Telephone sets including user guidance or feature selection means facilitating their use
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/247—Telephone sets including user guidance or feature selection means facilitating their use
    • H04M1/2473—Telephone terminals interfacing a personal computer, e.g. using an API (Application Programming Interface)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/247—Telephone sets including user guidance or feature selection means facilitating their use
    • H04M1/2477—Telephone sets including user guidance or feature selection means facilitating their use for selecting a function from a menu display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/253—Telephone sets using digital voice transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/663—Preventing unauthorised calls to a telephone set
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/068—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/436—Arrangements for screening incoming calls, i.e. evaluating the characteristics of a call before deciding whether to answer it
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
    • H04M3/53—Centralised arrangements for recording incoming messages, i.e. mailbox systems
    • H04M3/5307—Centralised arrangements for recording incoming messages, i.e. mailbox systems for recording messages comprising any combination of audio and non-audio components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
    • H04M3/53—Centralised arrangements for recording incoming messages, i.e. mailbox systems
    • H04M3/533—Voice mail systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/567—Multimedia conference systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/1295—Details of dual tone multiple frequency signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
    • H04N1/00206—Transmitting or receiving computer data via an image communication device, e.g. a facsimile transceiver
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6424—Access arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6424—Access arrangements
    • H04L2012/6427—Subscriber Access Module; Concentrator; Group equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6445—Admission control
    • H04L2012/6459—Multiplexing, e.g. TDMA, CDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6475—N-ISDN, Public Switched Telephone Network [PSTN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6481—Speech, voice
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6491—Echo cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6494—Silence suppression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/6505—Recording arrangements for recording a message from the calling party storing speech in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/45—Aspects of automatic or semi-automatic exchanges related to voicemail messaging
    • H04M2203/4509—Unified messaging with single point of access to voicemail and other mail or messaging systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/002—Applications of echo suppressors or cancellers in telephonic connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
DE69432389T 1993-10-25 1994-06-29 Vorwärtsruf- und Rückrufsignalisierung für ein rechnerbasiertes persönliches Mehrzweckkommunikationssystem Expired - Lifetime DE69432389D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/142,807 US5535204A (en) 1993-01-08 1993-10-25 Ringdown and ringback signalling for a computer-based multifunction personal communications system

Publications (1)

Publication Number Publication Date
DE69432389D1 true DE69432389D1 (de) 2003-05-08

Family

ID=22501361

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69432389T Expired - Lifetime DE69432389D1 (de) 1993-10-25 1994-06-29 Vorwärtsruf- und Rückrufsignalisierung für ein rechnerbasiertes persönliches Mehrzweckkommunikationssystem

Country Status (6)

Country Link
US (2) US5535204A (de)
EP (1) EP0650286B1 (de)
JP (1) JP2790977B2 (de)
AT (1) ATE236484T1 (de)
CA (1) CA2126928C (de)
DE (1) DE69432389D1 (de)

Families Citing this family (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5453986A (en) 1993-01-08 1995-09-26 Multi-Tech Systems, Inc. Dual port interface for a computer-based multifunction personal communication system
US5535204A (en) 1993-01-08 1996-07-09 Multi-Tech Systems, Inc. Ringdown and ringback signalling for a computer-based multifunction personal communications system
JP3022929B2 (ja) * 1994-03-02 2000-03-21 ディジタル サウンド コーポレイション オーディオ及びファクシミリメッセージ格納検索システムの対する信頼性あるアクセスの方法及び装置
US5757801A (en) 1994-04-19 1998-05-26 Multi-Tech Systems, Inc. Advanced priority statistical multiplexer
US5682386A (en) 1994-04-19 1997-10-28 Multi-Tech Systems, Inc. Data/voice/fax compression multiplexer
US5696699A (en) * 1995-02-13 1997-12-09 Intel Corporation Integrated cellular data/voice communication system working under one operating system
WO1997003513A1 (en) * 1995-07-07 1997-01-30 Multi-Tech Systems, Inc. Mode switching system for a voice over data modem
KR100923483B1 (ko) * 1996-02-09 2009-10-27 아이-링크 시스템즈, 아이엔씨. 오디오 전송 시스템 및 방법
US5751718A (en) * 1996-02-20 1998-05-12 Motorola, Inc. Simultaneous transfer of voice and data information using multi-rate vocoder and byte control protocol
US5943319A (en) * 1996-04-04 1999-08-24 Lucent Technologies Inc. Packet format interface for telecommunication instruments
JP3092053B2 (ja) * 1996-05-28 2000-09-25 松下電器産業株式会社 電話機における記録再生装置
US5805636A (en) * 1996-10-01 1998-09-08 Intel Corporation Method and apparatus for simultaneous voice, data, and video communication in a computer system
US6370149B1 (en) * 1998-07-20 2002-04-09 Ameritech Corporation Telecommunication system, method and subscriber unit for use therein
US7187686B1 (en) 1996-11-01 2007-03-06 Sbc Properties, B.P. Telecommunication system, method and subscriber unit for use therein
US6904037B2 (en) 1996-11-05 2005-06-07 Cisco Technology, Inc. Asymmetric implementation of DSVD for voice/data internet access
US6574335B1 (en) * 1999-12-22 2003-06-03 At&T Corp. Method for simulating a ring back for a call between parties in different communication networks
JP3759546B2 (ja) * 1996-12-03 2006-03-29 ソニー株式会社 電話装置、モデム装置、コンピユータ装置及び通信端末装置
US6104726A (en) * 1997-03-31 2000-08-15 Motorola, Inc. Simultaneous transfer of voice and data information using multi-rate vocoder and bit control protocol
US5949763A (en) * 1997-07-17 1999-09-07 Ameritech Corporation Method and apparatus for providing broadband access conferencing services
US6044150A (en) * 1997-08-21 2000-03-28 3Com Corporation Method and apparatus for a host-based personal computer speakerphone
US6138190A (en) * 1997-09-16 2000-10-24 Cirrus Logic, Inc. Analog front end and digital signal processing device and method
US6141356A (en) * 1997-11-10 2000-10-31 Ameritech Corporation System and method for distributing voice and data information over wireless and wireline networks
US6330235B1 (en) * 1997-11-24 2001-12-11 Hughes Electronics Corporation Method and apparatus providing data communication over an existing telephone network without interfering with normal telephony functions
US6711160B2 (en) * 1998-03-31 2004-03-23 International Business Machines Corporation Packet network telephone interface system for POTS
US6301246B1 (en) * 1998-08-17 2001-10-09 Siemens Information And Communication Networks, Inc. Silent monitoring in a voice-over-data-network environment
TW461180B (en) * 1998-12-21 2001-10-21 Sony Corp Digital/analog converter circuit, level shift circuit, shift register utilizing level shift circuit, sampling latch circuit, latch circuit and liquid crystal display device incorporating the same
US6449269B1 (en) * 1998-12-31 2002-09-10 Nortel Networks Limited Packet voice telephony system and method
WO2000054485A1 (en) * 1999-03-06 2000-09-14 Dti Networks, Inc. System and method for administrating call and call feature set-up in a telecommunications network
US7933295B2 (en) 1999-04-13 2011-04-26 Broadcom Corporation Cable modem with voice processing capability
US6285671B1 (en) 1999-04-22 2001-09-04 Ameritech Corporation Method and system for providing facsimile service over a digital subscriber line
US6335936B1 (en) 1999-04-22 2002-01-01 Ameritech Corporation Wide area communication networking
FI108185B (fi) * 1999-05-12 2001-11-30 Nokia Networks Oy Yhteyksien hallintamenetelmä
US20020061309A1 (en) * 2000-03-08 2002-05-23 Garger Stephen J. Production of peptides in plants as N-terminal viral coat protein fusions
US7046778B2 (en) * 2000-03-31 2006-05-16 Coppercom, Inc. Telecommunications portal capable of interpreting messages from an external device
US6731605B1 (en) 2000-06-19 2004-05-04 Sharp Laboratories Of America, Inc. Prioritized optimal server side bandwidth allocation in a multimedia session with push and pull sources
US7826440B1 (en) * 2001-02-01 2010-11-02 Estech Systems, Inc. Quality of service in a remote telephone
JPWO2003017577A1 (ja) * 2001-08-09 2004-12-09 松下電器産業株式会社 伝送装置および伝送方法
US6804692B2 (en) * 2001-12-21 2004-10-12 Agere Systems, Inc. Method and apparatus for reassembly of data blocks within a network processor
US20040001518A1 (en) * 2002-06-28 2004-01-01 Siemens Information System and method for emulating ringback transparently
US7133521B2 (en) * 2002-10-25 2006-11-07 Dilithium Networks Pty Ltd. Method and apparatus for DTMF detection and voice mixing in the CELP parameter domain
US20040131070A1 (en) * 2003-01-08 2004-07-08 Gary Rogalski System and method to facilitate simultaneous transmission of voice and data between a PC and remote telephony device
US7126472B2 (en) * 2003-07-22 2006-10-24 Mark W Kraus System and method of providing emergency response to a user carrying a user device
KR100581060B1 (ko) * 2003-11-12 2006-05-22 한국전자통신연구원 오감 데이터 동기화 전송 장치 및 그 방법과 그를 이용한실감형 멀티미디어 데이터 제공 시스템 및 그 방법
JP2008060937A (ja) * 2006-08-31 2008-03-13 Brother Ind Ltd 多機能周辺装置
US8031854B2 (en) * 2008-10-20 2011-10-04 At&T Intellectual Property I, L.P. Methods, systems, and products for providing ring backs
US8599834B2 (en) * 2009-09-29 2013-12-03 Ipc Systems, Inc. Systems, methods, and computer program products for providing a manual ring-down communication line using session initiation protocol
US11435735B2 (en) * 2017-03-30 2022-09-06 Toshiba Mitsubishi-Electric Industrial Systems Corporation Playback simulation test system

Family Cites Families (196)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US34034A (en) * 1861-12-24 Improvement in bee-hives
US3304372A (en) * 1963-06-28 1967-02-14 Ibm Voice-data multiplexing system for transmitting data during pauses in the voice signals
US3789165A (en) * 1972-04-24 1974-01-29 Communications Satellite Corp Echo canceller with variable threshold
US3904830A (en) * 1972-07-03 1975-09-09 Mek Tronix Lab Call tracing and identification system
US3997732A (en) * 1972-07-03 1976-12-14 Mek-Tronix Laboratories Corporation Call tracing and identification system
US3973089A (en) * 1973-10-29 1976-08-03 General Electric Company Adaptive hybrid circuit
GB1529452A (en) * 1975-04-10 1978-10-18 Ansafone Ltd Detection of direct currents or voltages
US3973081A (en) * 1975-09-12 1976-08-03 Trw Inc. Feedback residue compression for digital speech systems
US4107471A (en) * 1977-03-22 1978-08-15 International Telephone & Telegraph Corp. Frequency division multiplex communications system
US4100377A (en) * 1977-04-28 1978-07-11 Bell Telephone Laboratories, Incorporated Packet transmission of speech
US4284850A (en) * 1977-12-23 1981-08-18 Storage Technology Corporation Digital memory providing fixed and variable delays in a TASI system
US4205202A (en) * 1978-01-18 1980-05-27 Kahn Leonard R Method and means for improving the spectrum utilization of multichannel telephone systems
US4354273A (en) * 1979-06-12 1982-10-12 Nippon Electric Company, Ltd. ADPCM System for speech or like signals
US4445213A (en) * 1979-07-31 1984-04-24 Bell Telephone Laboratories, Incorporated Communication line interface for controlling data information having differing transmission characteristics
JPS5723356A (en) * 1980-07-02 1982-02-06 Hitachi Ltd Sound signal converter
US4377860A (en) * 1981-01-05 1983-03-22 American Microsystems, Inc. Bandwidth reduction method and structure for combining voice and data in a PCM channel
EP0070949B1 (de) * 1981-07-28 1986-05-07 International Business Machines Corporation Übertragungsverfahren für Sprache und digitale Daten und Ausführungsanordnung für das genannte Verfahren
US4425661A (en) * 1981-09-03 1984-01-10 Applied Spectrum Technologies, Inc. Data under voice communications system
US4476559A (en) * 1981-11-09 1984-10-09 At&T Bell Laboratories Simultaneous transmission of voice and data signals over a digital channel
US4500987A (en) * 1981-11-24 1985-02-19 Nippon Electric Co., Ltd. Loop transmission system
JPS6011360B2 (ja) * 1981-12-15 1985-03-25 ケイディディ株式会社 音声符号化方式
JPS594382A (ja) * 1982-06-30 1984-01-11 Nippon Telegr & Teleph Corp <Ntt> 描画像の符号化方式
US4495620A (en) * 1982-08-05 1985-01-22 At&T Bell Laboratories Transmitting data on the phase of speech
US4531023A (en) * 1982-08-13 1985-07-23 Hlf Corporation Computer security system for a time shared computer accessed over telephone lines
JPS5944140A (ja) * 1982-09-06 1984-03-12 Nec Corp 音声・デ−タ多重化伝送方式
US4479195A (en) * 1982-09-07 1984-10-23 At&T Bell Laboratories Data conference system
JPS5981947A (ja) * 1982-11-01 1984-05-11 Oki Electric Ind Co Ltd パケツト伝送方式
US4534024A (en) * 1982-12-02 1985-08-06 At&T Bell Laboratories System and method for controlling a multiple access data communications system including both data packets and voice packets being communicated over a cable television system
US4652703A (en) * 1983-03-01 1987-03-24 Racal Data Communications Inc. Digital voice transmission having improved echo suppression
US4609788A (en) * 1983-03-01 1986-09-02 Racal Data Communications Inc. Digital voice transmission having improved echo suppression
GB2137057B (en) * 1983-03-18 1986-07-02 Telspec Ltd Improvements in and relating to signal transmission devices
US4587651A (en) * 1983-05-04 1986-05-06 Cxc Corporation Distributed variable bandwidth switch for voice, data, and image communications
US4598397A (en) * 1984-02-21 1986-07-01 Cxc Corporation Microtelephone controller
US4578537A (en) * 1983-08-05 1986-03-25 International Remote Imaging Systems, Inc. Telecommunication apparatus serving as an interface between a digital computer and an analog communication medium
US4524244A (en) * 1983-08-05 1985-06-18 Cygnet Technologies, Inc. Digital and voice telecommunication apparatus
JPS60130235A (ja) * 1983-12-16 1985-07-11 Fujitsu Ltd デ−タ・音声伝送装置
US4546212A (en) * 1984-03-08 1985-10-08 Crowder, Inc. Data/voice adapter for telephone network
JPS60203059A (ja) * 1984-03-14 1985-10-14 Hashimoto Corp 電話線の切換接続装置
DE3409532A1 (de) * 1984-03-15 1985-09-19 Standard Elektrik Lorenz Ag, 7000 Stuttgart Kommunikationsendgeraet
US4593389A (en) * 1984-06-28 1986-06-03 Henry Wurzburg Simultaneous voice and asynchronous data telephone
US4697281A (en) * 1986-03-14 1987-09-29 Spectrum Cellular Communications Corporation, Inc. Cellular telephone data communication system and method
USRE34034E (en) 1985-10-11 1992-08-18 Spectrum Information Technologies, Inc. Cellular telephone data communication system and method
GB8423017D0 (en) * 1984-09-12 1984-10-17 Plessey Co Plc Echo canceller
US4622680A (en) * 1984-10-17 1986-11-11 General Electric Company Hybrid subband coder/decoder method and apparatus
GB2166320B (en) * 1984-10-25 1988-10-12 Stc Plc Packet switching system
US4629829A (en) * 1984-12-14 1986-12-16 Motorola, Inc. Full duplex speakerphone for radio and landline telephones
US4751736A (en) * 1985-01-31 1988-06-14 Communications Satellite Corporation Variable bit rate speech codec with backward-type prediction and quantization
GB2171576B (en) * 1985-02-04 1989-07-12 Mitel Telecom Ltd Spread spectrum leaky feeder communication system
US4750169A (en) * 1985-03-12 1988-06-07 Pacific Bell Telephone system and method for transmitting digital information
EP0200842B1 (de) * 1985-04-30 1992-10-14 International Business Machines Corporation Modem zur Steuerung eines Modemnetzes
US4718082A (en) * 1985-09-18 1988-01-05 Ark Electronics Modem for effecting full duplex asynchronous/synchronous digital data communications over voice grade telephone link
JPH0752845B2 (ja) * 1985-10-04 1995-06-05 日本電気株式会社 差分符号化回路
US4700341A (en) * 1985-10-30 1987-10-13 Racal Data Communications Inc. Stochastic time division multiplexing
DE3585034D1 (de) * 1985-10-30 1992-02-06 Ibm Verfahren zur bestimmung einer flachen echopfadverzoegerung und dieses verfahren verwendender echokompensator.
NL8600087A (nl) * 1986-01-17 1987-08-17 Philips Nv Inrichting voor vol-duplex datatransmissie over tweedraadsverbindingen.
US4740963A (en) * 1986-01-30 1988-04-26 Lear Siegler, Inc. Voice and data communication system
EP0239293A3 (de) * 1986-03-24 1988-12-14 Gpt Limited Datenübertragungssysteme
US4932048A (en) * 1986-04-15 1990-06-05 Canon Kabushiki Kaisha Data communication apparatus with voice communication control
US4926448A (en) * 1986-05-06 1990-05-15 Hayes Microcomputer Products, Inc. Method and apparatus for implementing an escape sequence
JPS62281553A (ja) * 1986-05-29 1987-12-07 Fujitsu Ltd 回線終端装置のバイパス方法
JPH0763171B2 (ja) * 1986-06-10 1995-07-05 株式会社日立製作所 データ／音声送受信方法
JPS6319951A (ja) * 1986-07-14 1988-01-27 Nippon Telegr & Teleph Corp <Ntt> 音声信号およびデ−タ信号の併合伝送方法およびその送信装置ならびに受信装置
US5008926A (en) * 1986-07-17 1991-04-16 Efrat Future Technology Ltd. Message management system
US4813040A (en) * 1986-10-31 1989-03-14 Futato Steven P Method and apparatus for transmitting digital data and real-time digitalized voice information over a communications channel
JPH07118749B2 (ja) * 1986-11-14 1995-12-18 株式会社日立製作所 音声／データ伝送装置
EP0272714B1 (de) * 1986-11-17 1992-06-24 Alcatel N.V. Einstellbarer Echokompensator
US4839802A (en) * 1986-11-19 1989-06-13 Extel Corporation Adaptation of computer to communication operation
ZA883232B (en) 1987-05-06 1989-07-26 Dowd Research Pty Ltd O Packet switches,switching methods,protocols and networks
US4845746A (en) * 1987-06-23 1989-07-04 Rockwell International Corporation Echo canceller with relative feedback control
US4891806A (en) 1987-09-18 1990-01-02 Racal Data Communications Inc. Constellation multiplexed inband secondary channel for voiceband modem
GB2210236B (en) * 1987-09-24 1991-12-18 Newbridge Networks Corp Speech processing system
JP2602847B2 (ja) * 1987-09-29 1997-04-23 株式会社日立製作所 マルチメディアメールシステム
US5008901A (en) * 1987-10-29 1991-04-16 U.S. Robotics, Inc. Asymmetrical duplex error-controlled modem
US4827085A (en) * 1987-11-19 1989-05-02 Ovonic Imaging Systems, Inc. Voice and image teleconferencing system including paperless facsimile means
US4995059A (en) * 1988-01-14 1991-02-19 Canon Kabushiki Kaisha Predictive coding device
US5025443A (en) * 1988-02-24 1991-06-18 Integrated Network Corporation Digital data over voice communication
JPH01221042A (ja) * 1988-02-29 1989-09-04 Toshiba Corp パケット交換機の輻輳制御方法
CA1301346C (en) 1988-02-29 1992-05-19 John Malec Passive data collection system for market research data
CA1314965C (en) * 1988-03-01 1993-03-23 Gerald Molnar Data interface for telephone system
US4890282A (en) * 1988-03-08 1989-12-26 Network Equipment Technologies, Inc. Mixed mode compression for data transmission
EP0331858B1 (de) * 1988-03-08 1993-08-25 International Business Machines Corporation Verfahren und Einrichtung zur Sprachkodierung mit mehreren Datenraten
US4887265A (en) * 1988-03-18 1989-12-12 Motorola, Inc. Packet-switched cellular telephone system
US5177734A (en) 1988-05-02 1993-01-05 Itt Corporation Multirate wire line modem apparatus
US4847900A (en) * 1988-05-02 1989-07-11 Northern Telecom Limited Infrared hookswitch for a telephone
US5195130A (en) 1988-05-05 1993-03-16 Transaction Technology, Inc. Computer and telephone apparatus with user friendly computer interface and enhanced integrity features
SE461308B (sv) * 1988-06-03 1990-01-29 Ericsson Telefon Ab L M Adaptivt digitalt filter omfattande en icke rekursiv del och en rekursiv del
US4991169A (en) * 1988-08-02 1991-02-05 International Business Machines Corporation Real-time digital signal processing relative to multiple digital communication channels
JPH0744511B2 (ja) * 1988-09-14 1995-05-15 富士通株式会社 高郊率多重化方式
US4864559A (en) * 1988-09-27 1989-09-05 Digital Equipment Corporation Method of multicast message distribution
EP0390931B1 (de) * 1988-09-27 1996-03-06 Texas Instruments Japan Ltd. Verfahren zur betriebsartanpassung eines modems
US4953210A (en) * 1988-10-19 1990-08-28 Hayes Microcomputer Products, Inc. Feature negotiation protocol for a synchronous modem
US4905282A (en) * 1988-10-19 1990-02-27 Hayes Microcomputer Products, Inc. Feature negotiation protocol and dynamically adjustable retraining sequence for a high speed half duplex modem
US4912758A (en) * 1988-10-26 1990-03-27 International Business Machines Corporation Full-duplex digital speakerphone
US4890316A (en) * 1988-10-28 1989-12-26 Walsh Dale M Modem for communicating at high speed over voice-grade telephone circuits
US5001745A (en) * 1988-11-03 1991-03-19 Pollock Charles A Method and apparatus for programmed audio annotation
US5107519A (en) * 1988-11-17 1992-04-21 Canon Kabushiki Kaisha Coding device and a decoding device
US5130985A (en) 1988-11-25 1992-07-14 Hitachi, Ltd. Speech packet communication system and method
US5406560A (en) 1988-11-25 1995-04-11 Hitachi, Ltd. Speech packet communication system
DE3840433A1 (de) * 1988-12-01 1990-06-07 Philips Patentverwaltung Echokompensator
US4914650A (en) * 1988-12-06 1990-04-03 American Telephone And Telegraph Company Bandwidth allocation and congestion control scheme for an integrated voice and data network
FR2641093B1 (de) * 1988-12-23 1994-04-29 Alcatel Business Systems
US4935954A (en) * 1988-12-28 1990-06-19 At&T Company Automated message retrieval system
US5081647A (en) * 1989-01-06 1992-01-14 American Telephone & Telegraph Company Communication of a voice signal via continuous quadrature amplitude modulator
US4972457A (en) * 1989-01-19 1990-11-20 Spectrum Information Technologies, Inc. Portable hybrid communication system and methods
US5020058A (en) * 1989-01-23 1991-05-28 Stratacom, Inc. Packet voice/data communication system having protocol independent repetitive packet suppression
NZ232224A (en) 1989-01-27 1993-03-26 British Telecomm Alternate burst communication for cordless phones: bursts contain synchronisation information
US5208850A (en) 1989-02-09 1993-05-04 Fujitsu Limited Multi-media information service center and multi-media communication system
CA2012868C (en) * 1989-03-23 1994-03-22 Shin-Ichiro Hayano Call control with transmission priority in a packet communication network of an atm type
US4912756A (en) * 1989-04-07 1990-03-27 Unilink Corporation Method and apparatus for error-free digital data transmission during cellular telephone handoff, etc.
JPH02272500A (ja) * 1989-04-13 1990-11-07 Fujitsu Ltd コード駆動音声符号化方式
US5036513A (en) * 1989-06-21 1991-07-30 Academy Of Applied Science Method of and apparatus for integrated voice (audio) communication simultaneously with "under voice" user-transparent digital data between telephone instruments
US5261027A (en) 1989-06-28 1993-11-09 Fujitsu Limited Code excited linear prediction speech coding system
JPH0332228A (ja) * 1989-06-29 1991-02-12 Fujitsu Ltd ゲイン―シェイプ・ベクトル量子化方式
US5062133A (en) * 1989-07-07 1991-10-29 Logotronix Incorporated Multi-function telephone call management system
JPH0344218A (ja) * 1989-07-12 1991-02-26 Fujitsu Ltd 適応形エコーキャンセラ
FR2651077B1 (fr) 1989-08-18 1994-06-10 Letourneur Gregoire Dispositif de traitement d'echo notamment acoustique dans une ligne telephonique
EP0420269A3 (en) * 1989-09-28 1992-12-30 Fujitsu Limited Adaptive digital filter including low-pass filter
US5095497A (en) * 1989-10-02 1992-03-10 At & T Bell Laboratories Technique for achieving the full coding gain of encoded digital signals
US5001710A (en) * 1989-10-24 1991-03-19 At&T Bell Laboratories Customer programmable automated integrated voice/data technique for communication systems
CA2001277C (en) * 1989-10-24 1994-07-12 Bruce Leigh Townsend Hands free telecommunications apparatus and method
US5051720A (en) * 1989-11-13 1991-09-24 Secure Telecom, Inc. Remote control system using power line of remote site
US5083310A (en) * 1989-11-14 1992-01-21 Apple Computer, Inc. Compression and expansion technique for digital audio data
US4977591A (en) * 1989-11-17 1990-12-11 Nynex Corporation Dual mode LMS nonlinear data echo canceller
US5136586A (en) * 1989-12-04 1992-08-04 Academy Of Applied Science Method and apparatus for telephone line multiplex channeling of toll-quality voice and digital information
JPH03226051A (ja) 1990-01-31 1991-10-07 Fujitsu Ltd 変復調器の速度通知方式
US5044010A (en) * 1990-03-29 1991-08-27 At&T Bell Laboratories Arrangement and method for selecting an available communication channel for a cordless telephone
US5065395A (en) * 1990-04-09 1991-11-12 Dsc Communications Corporation Rudimentary digital speech interpolation apparatus and method
US5054055A (en) * 1990-04-26 1991-10-01 Bell Atlantic Network Services, Inc. Telephone system and method for the intelligent use of individual calling line identification information
NL9001016A (nl) 1990-04-27 1991-11-18 Philips Nv Digitale echocompensator met een dubbelspraakdetector.
US5127041A (en) * 1990-06-01 1992-06-30 Spectrum Information Technologies, Inc. System and method for interfacing computers to diverse telephone networks
US5063513A (en) * 1990-06-15 1991-11-05 Nartron Corporation Vehicle preheater control
US5127001A (en) * 1990-06-22 1992-06-30 Unisys Corporation Conference call arrangement for distributed network
US5115429A (en) * 1990-08-02 1992-05-19 Codex Corporation Dynamic encoding rate control minimizes traffic congestion in a packet network
JP2503747B2 (ja) 1990-09-12 1996-06-05 日本電気株式会社 Ｆｉｒ形エコ―キャンセラ
JPH04123621A (ja) 1990-09-14 1992-04-23 Nippon Telegr & Teleph Corp <Ntt> 反響消去装置
US5473676A (en) 1990-09-27 1995-12-05 Radish Communications Systems, Inc. Telephone handset interface for automatic switching between voice and data communications
US5493609A (en) 1990-09-27 1996-02-20 Radish Communications Systems, Inc. Telecommunication system for automatic switching between voice and data communications
US5164982A (en) 1990-09-27 1992-11-17 Radish Communications Systems, Inc. Telecommunication display system
US5444770A (en) 1990-09-27 1995-08-22 Radish Communications Systems, Inc. Telephone handset interface for automatic switching between voice and data communications
US5365577A (en) 1990-09-27 1994-11-15 Radish Communications Systems, Inc. Telecommunication display system
US5193110A (en) 1990-10-09 1993-03-09 Boston Technology, Incorporated Integrated services platform for telephone communication system
US5247591A (en) 1990-10-10 1993-09-21 Interfax, Inc. Method and apparatus for the primary and secondary routing of fax mesages using hand printed characters
JPH04168973A (ja) 1990-10-31 1992-06-17 Toshiba Corp 電源回路及びこれを用いた駆動回路
CA2051029C (en) 1990-11-30 1996-11-05 Pradeep S. Sindhu Arbitration of packet switched busses, including busses for shared memory multiprocessors
GB2251097B (en) 1990-12-08 1995-05-10 Dowty Information Systems An adaptive data compression system
US5214656A (en) 1990-12-13 1993-05-25 At&T Bell Laboratories Multiplexed coded modulation with unequal error protection
NL9002790A (nl) 1990-12-18 1992-07-16 Philips Nv Echocompensator met verbeterde dubbelspraak detectie.
FR2670973B1 (fr) 1990-12-19 1994-04-15 Ouest Standard Telematique Sa Systeme de transmission par paquets a compression de donnees, procede et equipement correspondant.
US5263019A (en) 1991-01-04 1993-11-16 Picturetel Corporation Method and apparatus for estimating the level of acoustic feedback between a loudspeaker and microphone
US5187591A (en) 1991-01-24 1993-02-16 Micom Communications Corp. System for transmitting and receiving aural information and modulated data
JP2842026B2 (ja) 1991-02-20 1998-12-24 日本電気株式会社 適応フィルタの係数制御方法及び装置
US5341374A (en) 1991-03-01 1994-08-23 Trilan Systems Corporation Communication network integrating voice data and video with distributed call processing
JPH0739968B2 (ja) 1991-03-25 1995-05-01 日本電信電話株式会社 音響伝達特性模擬方法
US5150410A (en) * 1991-04-11 1992-09-22 Itt Corporation Secure digital conferencing system
US5283819A (en) 1991-04-25 1994-02-01 Compuadd Corporation Computing and multimedia entertainment system
US5283638A (en) 1991-04-25 1994-02-01 Compuadd Corporation Multimedia computing and telecommunications workstation
US5479407A (en) 1991-05-24 1995-12-26 Ko; Cheng-Hsu Channel utilization method and system for ISDN
TW327488U (en) 1991-05-29 1998-02-21 Video Tech Eng Digital cordless telephone apparatus
US5206900B1 (en) 1991-05-31 1998-06-09 David Callele Automated attendant
HU215861B (hu) 1991-06-11 1999-03-29 Qualcomm Inc. Eljárások beszédjelek tömörítésére digitalizált minták változtatható sebességű kódolásával és dekódolásával, valamint eszközök ezen eljárások foganatosításához
DE69221949T2 (de) 1991-06-13 1998-04-02 Nec Corp Verfahren und Einrichtung zur Echokompensation in einem digitalen Fernmeldesystem
US5307413A (en) 1991-07-19 1994-04-26 Process Software Corporation Method and apparatus for adding data compression and other services in a computer network
US5379340A (en) 1991-08-02 1995-01-03 Betterprize Limited Text communication system
US5309562A (en) 1991-08-19 1994-05-03 Multi-Tech Systems, Inc. Method and apparatus for establishing protocol spoofing from a modem
US5233660A (en) 1991-09-10 1993-08-03 At&T Bell Laboratories Method and apparatus for low-delay celp speech coding and decoding
JP3226945B2 (ja) 1991-10-02 2001-11-12 キヤノン株式会社 マルチメディア通信装置
GB2260670A (en) 1991-10-18 1993-04-21 * Norm Pacific Automation Corporation Multi-functional telephone system with speech recognition and control device
US5371853A (en) 1991-10-28 1994-12-06 University Of Maryland At College Park Method and system for CELP speech coding and codebook for use therewith
US5377260A (en) 1991-12-05 1994-12-27 Sierra Semiconductor Corporation Telephone circuit to control off-hook status during receipt of caller-ID signal
US5276703A (en) 1992-01-13 1994-01-04 Windata, Inc. Wireless local area network communications system
US5425089A (en) 1992-01-27 1995-06-13 Chan; John Y. Low cost telephone caller identification device and method
US5305312A (en) 1992-02-07 1994-04-19 At&T Bell Laboratories Apparatus for interfacing analog telephones and digital data terminals to an ISDN line
CA2086694C (en) 1992-03-05 1996-12-31 Steven K. Miller System, data processing method and program to provide a programmable interface between a workstation and an archive server to automatically store telephone transaction information
US5249218A (en) 1992-04-06 1993-09-28 Spectrum Information Technologies, Inc. Programmable universal interface system
US5295136A (en) 1992-04-13 1994-03-15 Motorola, Inc. Method of performing convergence in a, least mean square, adaptive filter, echo canceller
US5282197A (en) 1992-05-15 1994-01-25 International Business Machines Low frequency audio sub-channel embedded signalling
US5327520A (en) 1992-06-04 1994-07-05 At&T Bell Laboratories Method of use of voice message coder/decoder
JPH066428A (ja) 1992-06-18 1994-01-14 Nec Corp 着呼識別機能付電話機
US5388150A (en) 1992-07-28 1995-02-07 Schneyer; Robin Automatic incoming telephone call identification and disposition system
US5301246A (en) 1992-07-29 1994-04-05 At&T Bell Laboratories Data communications equipment security device using calling party directory number
US5343473A (en) 1992-08-07 1994-08-30 International Business Machines Corporation Method of determining whether to use preempt/resume or alternate protocol for data transmission
US5317604A (en) 1992-12-30 1994-05-31 Gte Government Systems Corporation Isochronous interface method
US5463616A (en) 1993-01-07 1995-10-31 Advanced Protocol Systems, Inc. Method and apparatus for establishing a full-duplex, concurrent, voice/non-voice connection between two sites
JPH06318951A (ja) 1993-01-07 1994-11-15 Toshiba Corp セル転送方法およびセル転送システム
US5535204A (en) 1993-01-08 1996-07-09 Multi-Tech Systems, Inc. Ringdown and ringback signalling for a computer-based multifunction personal communications system
US5452289A (en) 1993-01-08 1995-09-19 Multi-Tech Systems, Inc. Computer-based multifunction personal communications system
US5406557A (en) 1993-02-01 1995-04-11 National Semiconductor Corporation Interenterprise electronic mail hub
US5355365A (en) 1993-03-31 1994-10-11 Multi-Tech Systems, Inc. Intelligent local area network modem node
US5384780A (en) 1993-05-14 1995-01-24 Codex Corporation High speed modem, method and system for achieving synchronous data compression
US5403322A (en) 1993-07-08 1995-04-04 Smith & Nephew Richards Inc. Drill guide and method for avoiding intramedullary nails in the placement of bone pins
IL106746A (en) 1993-08-19 1997-02-18 News Datacom Ltd CATV systems
US5472351A (en) 1993-10-06 1995-12-05 U.S. Robotics, Inc. Personal computer modem card interface construction
US5479475A (en) 1993-11-15 1995-12-26 Qualcomm Incorporated Method and system for providing communication between standard terminal equipment using a remote communication unit
US5390239A (en) 1994-03-17 1995-02-14 Morris; Gregory A. Method for increasing digital data throughput over telephone lines
US5438614A (en) 1994-05-25 1995-08-01 U.S. Robotics, Inc. Modem management techniques
US5416776A (en) 1994-05-27 1995-05-16 U.S. Robotics, Inc. Modem backplane techniques

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CA2126928C (en) 1998-09-01
EP0650286A3 (de) 1997-10-29
JP2790977B2 (ja) 1998-08-27
EP0650286A2 (de) 1995-04-26
US5535204A (en) 1996-07-09
JPH07183973A (ja) 1995-07-21
ATE236484T1 (de) 2003-04-15
EP0650286B1 (de) 2003-04-02
CA2126928A1 (en) 1995-04-26

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