CA2245171A1 - Smart telecommunications interface - Google Patents

Smart telecommunications interface

Info

Publication number
CA2245171A1
CA2245171A1 CA002245171A CA2245171A CA2245171A1 CA 2245171 A1 CA2245171 A1 CA 2245171A1 CA 002245171 A CA002245171 A CA 002245171A CA 2245171 A CA2245171 A CA 2245171A CA 2245171 A1 CA2245171 A1 CA 2245171A1
Authority
CA
Canada
Prior art keywords
telephone
telephone base
sit
user
optimal
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.)
Granted
Application number
CA002245171A
Other languages
French (fr)
Other versions
CA2245171C (en
Inventor
Bruce W. Stelman
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.)
GN Audio USA Inc
Original Assignee
Hello Direct, Inc.
Bruce W. Stelman
Gn Netcom, 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 Hello Direct, Inc., Bruce W. Stelman, Gn Netcom, Inc. filed Critical Hello Direct, Inc.
Priority to CA002319706A priority Critical patent/CA2319706C/en
Priority to CA002319696A priority patent/CA2319696C/en
Priority to CA002319224A priority patent/CA2319224C/en
Publication of CA2245171A1 publication Critical patent/CA2245171A1/en
Application granted granted Critical
Publication of CA2245171C publication Critical patent/CA2245171C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • 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
    • H04M3/42314—Systems providing special services or facilities to subscribers in private branch exchanges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
    • 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
    • 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
    • H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks

Abstract

The present invention overcomes interface problems between proprietary handset ports on telephone base units and voice/data accessory products by allowing a user to automatically calibrate the telephone accessory product for an optimal interface match with the intended telephone base unit. This is accomplished through the use of a "Smart Interface Technology" (SIT) integrated chip set consisting of a full custom analog and semi-custom digital integrated circuit. The SIT incorporates three different methods for "learning" the characteristics of 4-wire port modular interfaces found in all telephone station sets. Basically, these methods determine the appropriate 4-wire terminal configurations, the transmit and receive channels of the intended telephone base unit, and adjust the channel sensitivities until an optimal and clear signal is provided for the user.
CA002245171A 1996-03-27 1997-03-27 Smart telecommunications interface Expired - Fee Related CA2245171C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002319706A CA2319706C (en) 1996-03-27 1997-03-27 Method of learning the characteristics of a telephone
CA002319696A CA2319696C (en) 1996-03-27 1997-03-27 Methods of learning the characteristics of a telephone
CA002319224A CA2319224C (en) 1996-03-27 1997-03-27 Method of learning the characteristics of a telephone

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/625,398 1996-03-27
US08/625,398 US5892823A (en) 1996-03-27 1996-03-27 Smart interface technology
PCT/US1997/006085 WO1997036411A2 (en) 1996-03-27 1997-03-27 Smart telecommunications interface

Related Child Applications (3)

Application Number Title Priority Date Filing Date
CA002319696A Division CA2319696C (en) 1996-03-27 1997-03-27 Methods of learning the characteristics of a telephone
CA002319224A Division CA2319224C (en) 1996-03-27 1997-03-27 Method of learning the characteristics of a telephone
CA002319706A Division CA2319706C (en) 1996-03-27 1997-03-27 Method of learning the characteristics of a telephone

Publications (2)

Publication Number Publication Date
CA2245171A1 true CA2245171A1 (en) 1997-10-02
CA2245171C CA2245171C (en) 2001-05-15

Family

ID=24505893

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002245171A Expired - Fee Related CA2245171C (en) 1996-03-27 1997-03-27 Smart telecommunications interface

Country Status (8)

Country Link
US (3) US5892823A (en)
EP (1) EP0890247B1 (en)
JP (1) JP3678756B2 (en)
KR (1) KR100275144B1 (en)
CN (1) CN1119005C (en)
CA (1) CA2245171C (en)
DE (1) DE69730207T2 (en)
WO (1) WO1997036411A2 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5892823A (en) * 1996-03-27 1999-04-06 Hello Direct, Inc. Smart interface technology
US5912964A (en) * 1996-03-27 1999-06-15 Hello Direct, Inc. Adaptive telephone handset interface
DK172488B1 (en) * 1996-07-30 1998-10-05 Gn Netcom As Headset interface and methods for adjusting the same
US5729603A (en) * 1996-09-30 1998-03-17 Plantronics, Inc. Self-configuring telephone interface unit
US6128369A (en) * 1997-05-14 2000-10-03 A.T.&T. Corp. Employing customer premises equipment in communications network maintenance
US6108404A (en) * 1998-02-05 2000-08-22 Mci Communications Corporation Method and system for testing a connection in a telephone network using interactive telephone response module
GB9804905D0 (en) * 1998-03-10 1998-04-29 Knowles Electronics Co Telephone interface device
US6026146A (en) * 1998-06-08 2000-02-15 Lucent Technologies Inc. Automated voice terminal protocol identification system
US6084958A (en) * 1998-06-23 2000-07-04 Starium Ltd Determining the manner in which the wires connecting to a base set of a telephone system are used for transmission and reception of electrical signals representing a communication
US6731748B1 (en) * 1998-11-30 2004-05-04 Qualcomm Incorporated Audio interface for satellite user terminals
US6377678B1 (en) 1999-04-01 2002-04-23 Knowles Electronics, Llc Telephone handset emulator
US7197137B1 (en) * 1999-06-14 2007-03-27 Intel Corporation Interface class discovery method and device
US6931121B1 (en) * 1999-07-28 2005-08-16 Intel Corporation Dual personality analog port
US6671371B1 (en) * 1999-08-30 2003-12-30 Plantronics, Inc. Adaptive transmit amplifier
US7633963B1 (en) * 1999-09-22 2009-12-15 Plantronics, Inc. Accessory interface bus for telephone headset adapter
JP4326180B2 (en) * 1999-11-19 2009-09-02 ハロー・ダイレクト・インク Method and apparatus for interfacing between a telephone communication device and a digital, analog or hybrid telephone switching device
US6721404B1 (en) 2002-09-12 2004-04-13 Plantronics, Inc. Remotely controlled diagnostic telephone system with modem
US7003085B1 (en) 2002-09-12 2006-02-21 Plantronics, Inc. Customer service process for remotely assisting users of telephone and modem systems
US7167694B2 (en) * 2003-04-14 2007-01-23 Silicon Laboratories Inc. Integrated multi-tuner satellite receiver architecture and associated method
WO2005022874A1 (en) * 2003-08-29 2005-03-10 Infineon Technologies Ag Communication device for connection to an external acoustic transducer
ITPD20070001A1 (en) 2007-01-02 2008-07-03 Stefano Malagodi DEPTH BUOY FOR MARITIME APPLICATIONS AND PROCEDURE FOR ITS REALIZATION
EP2202950B1 (en) * 2008-12-23 2015-12-09 GN Netcom A/S Adaptive ringtone detector
ATE532319T1 (en) 2008-12-30 2011-11-15 Gn Netcom As AUTOMATIC SWITCHING AND RANGE CALIBRATION OF A HEADPHONE INTERFACE UNIT
TW201044839A (en) * 2009-06-08 2010-12-16 Askey Computer Corp Network phone
CN106648521A (en) * 2016-09-27 2017-05-10 北京小米移动软件有限公司 Terminal device operation method and apparatus

Family Cites Families (167)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US35536A (en) * 1862-06-10 Improvement in fanning-mills
US3566271A (en) * 1969-02-18 1971-02-23 Int Communications Corp Automatic equilization for multiple polled stations
US3715513A (en) * 1970-10-29 1973-02-06 Dnd Electronics Pabx-interface interconnection device
US3865995A (en) * 1973-03-14 1975-02-11 Nitsuko Ltd Universal subscriber{3 s line circuit in a key telephone system
NO142768C (en) * 1974-01-26 1980-10-08 Licentia Gmbh CLUTCH FOR AUTOMATIC DYNAMICS COMPRESSION OR EXPANSION
US3892924A (en) * 1974-08-12 1975-07-01 Bell Telephone Labor Inc Active hybrid sidetone producing circuitry for sidetoneless telephone
US3943305A (en) * 1974-11-11 1976-03-09 Magnetic Controls Company Telephone line control system
CA1058340A (en) * 1975-06-30 1979-07-10 International Standard Electric Corporation Two-way loudspeaking device for telephone stations
US4425664A (en) * 1975-11-26 1984-01-10 Bell Telephone Laboratories, Incorporated Multiport programmable digital data set
DE2619192A1 (en) * 1976-04-30 1977-11-17 Licentia Gmbh CIRCUIT FOR AUTOMATIC DYNAMIC COMPRESSION OR EXPANSION
US4055729A (en) * 1976-05-24 1977-10-25 Exxon Research & Engineering Co. Apparatus for the direct connection of ancillary equipment to a telephone network
JPS5816668B2 (en) * 1976-11-12 1983-04-01 富士通株式会社 Facsimile transmission method
US4088844A (en) * 1976-12-21 1978-05-09 Bell Telephone Laboratories, Incorporated Telephone station set interface circuit
GB1583635A (en) * 1977-03-02 1981-01-28 Int Standard Electric Corp Subscriber line or trunk circuit
US4096362A (en) * 1977-06-20 1978-06-20 Bell Telephone Laboratories, Incorporated Automatic cable balancing network
US4142075A (en) * 1977-10-11 1979-02-27 Burr-Brown Research Corporation Interface circuit and method for telephone extension lines
JPS54136253A (en) * 1978-04-14 1979-10-23 Nec Corp Adaptive type electronic hybrid circuit
US4160122A (en) * 1978-05-23 1979-07-03 Jacobson Sava Telephone earphone amplifier
NL7904429A (en) * 1979-06-06 1980-12-09 Philips Nv FLOW DETECTION DEVICE FOR AN AUTOMATIC TELEPHONE CONTROL PANEL.
US4278848A (en) * 1979-08-06 1981-07-14 Bell Telephone Laboratories, Incorporated Automatically adjustable bidirectional-to-unidirectional transmission network
IT1119498B (en) * 1979-11-19 1986-03-10 Cselt Centro Studi Lab Telecom SYSTEM OF EXCHANGE AND DISCLOSURE OF INFORMATION BY MEANS OF THE TELEPHONE NETWORK OF DISTRIBUTION TO THE USER
US4368362A (en) * 1980-07-28 1983-01-11 Bell Telephone Laboratories, Incorporated Automatic telephone loaded/nonloaded facility type identification circuit
US4368361A (en) * 1980-07-28 1983-01-11 Bell Telephone Laboratories, Incorporated Automatically adjustable bidirectional-to-unidirectional transmission network
US4367374A (en) * 1981-02-17 1983-01-04 Novation, Inc. Modem telephone interface circuit
DE3210034A1 (en) 1981-03-23 1982-09-30 AKG Akustische u. Kino-Geräte GmbH, 1150 Wien Ear pad for a headphone earpiece
FR2518854B1 (en) * 1981-12-18 1986-08-08 Thomson Csf Mat Tel TELEPHONE SET WITH SPEECH AMPLIFIERS
US4431871A (en) * 1982-01-21 1984-02-14 Northern Telecom Limited Solid state relay
US4446335A (en) * 1982-01-25 1984-05-01 Dynametric, Inc. Telephone signal recording methods and apparatus
FR2525056A1 (en) * 1982-04-09 1983-10-14 Telephonie Ind Commerciale LINE-OFF PLUG-OUT DEVICE FOR A TELEPHONE STATION COMPRISING A MICROPROCESSOR
JPS58178658A (en) * 1982-04-12 1983-10-19 Mitsubishi Electric Corp Data communicating system
JPS59115633A (en) * 1982-12-22 1984-07-04 Toshiba Corp Information transmitting system
JPS59165540A (en) * 1983-03-09 1984-09-18 Ricoh Co Ltd Control system for data transmission
US4636584A (en) * 1983-10-28 1987-01-13 At&T Bell Laboratories Signaling protocol channel unit
DE3410145A1 (en) * 1984-03-20 1985-10-03 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for connecting an ancillary device to a telephone line
US4712231A (en) * 1984-04-06 1987-12-08 Shure Brothers, Inc. Teleconference system
US4697282A (en) * 1984-04-18 1987-09-29 Golden Enterprises, Inc. Telephone operator voice storage and retrieval system
US4567332A (en) * 1984-05-03 1986-01-28 Jamison William E Four-wire telephone system with self-test means
US4759059A (en) * 1984-06-01 1988-07-19 Christensen Larry B Analog telephone circuit for digital telephone system
US4815121A (en) * 1984-06-06 1989-03-21 Canon Kabushiki Kaisha Communication apparatus recognizing speech and automatically switching from data to speech transmission
US4588856A (en) * 1984-08-23 1986-05-13 Timex Computer Corporation Automatic line impedance balancing circuit for computer/telephone communications interface
US4696032A (en) * 1985-02-26 1987-09-22 Siemens Corporate Research & Support, Inc. Voice switched gain system
US4677667A (en) * 1985-08-29 1987-06-30 Gte Communication Systems Corporation Subscriber line circuit having improved AC impedance matching
US4932047A (en) * 1985-11-07 1990-06-05 Luma Telecom, Inc. Conversational video phone
CA1261441A (en) * 1986-05-12 1989-09-26 Robert P. Brennan Programmable subscriber set
JPH02500708A (en) * 1986-09-16 1990-03-08 アルカテル・エヌ・ブイ communication interface
JPS6390951A (en) * 1986-09-30 1988-04-21 シーメンス、アクチエンゲゼルシヤフト Method and apparatus for controlling gain of telephone equipment
AU608267B2 (en) 1986-12-01 1991-03-28 British Telecommunications Public Limited Company Duplex data transmission
KR900005796B1 (en) * 1986-12-02 1990-08-11 삼성전자 주식회사 Method for controlling the power supply of modem
US4759054A (en) * 1986-12-22 1988-07-19 Protel, Inc. Toll telephone system and method for maintaining or initiating loop current after resuming on-hook condition
US4893331A (en) * 1987-02-24 1990-01-09 Kabushiki Kaisha Toshiba System allowing selective connection of various types of external apparatuses to telephone set
US4852160A (en) * 1987-03-03 1989-07-25 Kiko Frederick J Channel unit interface circuit
FR2612029B1 (en) * 1987-03-03 1989-05-12 Connan Jean Louis DEVICE FOR REALIZING THE "HANDSFREE" FUNCTION IN A TELEPHONE SET, COMBINING THE GAIN SWITCHING AND ECHO CANCELLATION FUNCTIONS
US4782524A (en) * 1987-05-05 1988-11-01 Rockwell International Corporation Telephone headset interface circuit
US4939767A (en) * 1987-05-20 1990-07-03 Sanyo Electric Co., Ltd. System and method for transmitting image data on a telephone network or equivalent
JPS6412649A (en) * 1987-07-06 1989-01-17 Nec Corp Variable gain circuit for loudspeaker telephone set
US4788708A (en) * 1987-11-25 1988-11-29 Tele-Technix, Inc. Universal headset tester
US4825465A (en) * 1987-12-10 1989-04-25 Telecommunication Concepts, Inc. Exclusionary device for coupling plural telephonic devices to a single central office trunk
US4879746A (en) * 1987-12-30 1989-11-07 Plantronics, Inc. Voice communication link interface apparatus
US4993060A (en) * 1988-02-23 1991-02-12 Kelly Gavan E Portable device for use by a news reporter
CA1311286C (en) * 1988-03-10 1992-12-08 David Joseph Robertson Digital key telephone system
US4856049A (en) * 1988-03-18 1989-08-08 Jerry R. Iggulden Single line compatible fax system
US4852153A (en) * 1988-03-18 1989-07-25 Jerry R. Iggulden Single line master telephone with FAX connection
US4914690A (en) * 1988-03-31 1990-04-03 Nicollet Technologies, Inc. Universal PBX interface
JPH01147559U (en) * 1988-03-31 1989-10-12
US4864567A (en) * 1988-05-04 1989-09-05 The United States Of America As Represented By The Secretary Of The Navy High throughput data communication system
US4894860A (en) * 1988-06-07 1990-01-16 Tie/Communications, Inc. Trunk interface circuitry for telephone systems
USD312627S (en) 1988-06-16 1990-12-04 Gutzmer Howard A Modem interface unit
US4907267A (en) * 1988-06-16 1990-03-06 Gutzmer Howard A Modem interface device
EP0351161A3 (en) * 1988-07-12 1991-04-17 Peter Eric Krebs Testing communications systems
JPH0290887A (en) * 1988-09-28 1990-03-30 Toshiba Corp Antisidetone device for key telephone system
KR910009672B1 (en) * 1988-10-14 1991-11-25 삼성전자 주식회사 Apparatus for compensating the output signal level of modem automatically and its method
US5001746A (en) * 1988-10-29 1991-03-19 Shirohato Yakuhin Co., Ltd. Transmission control unit
US4930156A (en) * 1988-11-18 1990-05-29 Norcom Electronics Corporation Telephone receiver transmitter device
US5029203A (en) * 1988-11-30 1991-07-02 Rohm Co., Ltd. Side tone preventive circuit for telephone
US4876712A (en) * 1988-12-09 1989-10-24 Electronics, Inc. Programmable telephone amplifier circuit interface
US4887288A (en) * 1988-12-28 1989-12-12 American Telephone And Telegraph Company Self calibration arrangement for a voice switched speakerphone
US4901346A (en) * 1988-12-28 1990-02-13 American Telephone And Telegraph Co. Computer controlled speakerphone for adapting to a communication line
US5235637A (en) 1989-01-26 1993-08-10 Plantronics, Inc. Voice communication link interface
US4879738A (en) * 1989-02-16 1989-11-07 Northern Telecom Limited Digital telephony card for use in an operator system
US4928306A (en) * 1989-02-28 1990-05-22 International Business Machines Corporation Dynamically configurable telephone
US5070527A (en) * 1989-03-02 1991-12-03 Acs Communications, Inc. Time dependant, variable amplitude threshold output circuit for frequency variant and frequency invarient signal discrimination
US4984262A (en) * 1989-03-03 1991-01-08 Nippon Telegraph And Telephone Corporation Digital service unit
JP2842607B2 (en) * 1989-03-13 1999-01-06 株式会社日立製作所 Echo canceller, communication device including the same, and signal processing method
US4918726A (en) * 1989-04-10 1990-04-17 Snyder Gary K Line powered universal telephone amplifier
US4951002A (en) * 1989-04-13 1990-08-21 Plantronics, Inc. Battery powered in-line amplifier
US4951312A (en) * 1989-04-27 1990-08-21 Matsushita Electric Works, Ltd. Balanced transmission device
US5206898A (en) * 1989-05-26 1993-04-27 Shirohato Yakuhiin Co., Ltd. Transmission control unit
US5016271A (en) * 1989-05-30 1991-05-14 At&T Bell Laboratories Echo canceler-suppressor speakerphone
ATE141458T1 (en) * 1989-05-31 1996-08-15 Siemens Ag INTERFACE SETUP
US4975949A (en) * 1989-06-15 1990-12-04 Plantronics, Inc. Electronic headset telephone
US5014299A (en) * 1989-07-20 1991-05-07 Christopher Klupt Modem coupler for multi-line key telephone system
US5133007A (en) * 1989-10-26 1992-07-21 Ricoh Company, Ltd. Side tone correction circuit
JPH0817437B2 (en) * 1989-11-29 1996-02-21 シャープ株式会社 Fax machine
US5058155A (en) * 1989-12-01 1991-10-15 Gn Netcom A/S Multipurpose headset amplifier
US5059141A (en) * 1989-12-08 1991-10-22 Scott Xenophon C Modem/telephone handset cord adaptor
US5034978A (en) * 1989-12-15 1991-07-23 Xel Communications, Inc. Universal channel unit switchable between two wire and four wire configurations
US5036536A (en) * 1990-02-20 1991-07-30 Plantronics, Inc. Electret microphone transmitter for use in telephone circuits
DE4008450A1 (en) * 1990-03-16 1991-09-19 Telefonbau & Normalzeit Gmbh CIRCUIT ARRANGEMENT FOR SIGNAL AND INFORMATION CONVERSION BETWEEN ANALOG-OPERATED CONNECTION LINES AND DIGITALLY-OPERATED CONNECTING BODIES IN COMMUNICATION SWITCHING SYSTEMS
EP0448754B1 (en) * 1990-03-27 1993-11-03 Siemens Aktiengesellschaft Two-wire-four-wire converter
DE59003360D1 (en) * 1990-03-27 1993-12-09 Siemens Ag Two-wire to four-wire converter.
US5191606A (en) * 1990-05-08 1993-03-02 Industrial Technology Research Institute Electrical telephone speech network
US5185789A (en) 1990-05-30 1993-02-09 Plantronics, Inc. Universal telephone handset interface
US5097501A (en) * 1990-06-29 1992-03-17 At&T Bell Laboratories Key telephone interface
US5018184A (en) * 1990-07-03 1991-05-21 At&T Bell Laboratories Automated channel test unit
GB2250398B (en) * 1990-08-23 1994-12-07 Nec Corp Apparatus for communication by telephone set and facsimile set through order wires
US5586181A (en) * 1990-09-04 1996-12-17 Tollgrade Communications, Inc. Metallic channel unit network
US5493609A (en) * 1990-09-27 1996-02-20 Radish Communications Systems, Inc. Telecommunication system for automatic switching between voice and data communications
US5444770A (en) * 1990-09-27 1995-08-22 Radish Communications Systems, Inc. Telephone handset interface for automatic switching between voice and data communications
US5583922A (en) * 1990-09-27 1996-12-10 Radish Communication Systems, Inc. Telecommunication system for automatic switching between voice and visual data communications using forms
US5473676A (en) * 1990-09-27 1995-12-05 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
US5164982A (en) * 1990-09-27 1992-11-17 Radish Communications Systems, Inc. Telecommunication display system
US5073919A (en) * 1990-10-10 1991-12-17 Teradyne, Inc. Automatically testing telephone lines
US5333194A (en) * 1990-10-15 1994-07-26 Glenayre Electronics, Inc. Autoequalizing bidirectional-to-unidirectional hybrid network
US5133006A (en) * 1990-10-31 1992-07-21 Seiscor Technologies Inc. Combination interface circuit for coupling a digital loop carrier telephone system
US5241590A (en) 1990-12-18 1993-08-31 Dialing Devices Inc. Telephone dialing apparatus
US5237605A (en) * 1990-12-24 1993-08-17 At&T Bell Laboratories Adjunct interface apparatus for a telephone set
US5170430A (en) * 1991-01-04 1992-12-08 Schuh Peter O Voice-switched handset receive amplifier
US5239579A (en) 1991-01-04 1993-08-24 Schuh Peter O Adaptive amplifier circuit
US5179586A (en) * 1991-03-13 1993-01-12 Northern Telecom Limited Line interface circuit
KR940002146B1 (en) 1991-05-27 1994-03-18 삼성전자 주식회사 Telephone system
US5210784A (en) 1991-06-28 1993-05-11 Lifeline Systems, Inc. Adaptive speakerphone system
US5265151A (en) * 1991-07-26 1993-11-23 General Datacomm, Inc. Method of improving modem performance by controlling transmitted power of modem, and modem implementing the same
CA2052351C (en) 1991-09-27 2000-05-23 Gordon J. Reesor Telephone handsfree algorithm
SE9103382L (en) 1991-11-15 1993-05-16 Televerket DEVICE FOR CONNECTING ADAPTATION TO THE DIGITAL TELECOMMUNICATIONS
EP0673584A1 (en) * 1991-12-09 1995-09-27 The Post Office Communications terminal equipment
US5353347A (en) 1992-02-04 1994-10-04 Acs Communications, Inc. Telephone headset amplifier with battery saver, receive line noise reduction, and click-free mute switching
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
JP2836341B2 (en) * 1992-02-24 1998-12-14 富士通株式会社 Meeting telephone circuit
US5229721A (en) 1992-04-06 1993-07-20 Plantronics, Inc. Micropower amplifier/transducer driver with signal expansion
US5249218A (en) * 1992-04-06 1993-09-28 Spectrum Information Technologies, Inc. Programmable universal interface system
US5321745A (en) * 1992-05-26 1994-06-14 Vmx, Inc. Adaptive efficient single/dual tone decoder apparatus and method for identifying call-progression signals
US5303308A (en) 1992-07-07 1994-04-12 Gn Netcom A/S Audio frequency signal compressing system
DE69323661T2 (en) * 1992-07-17 1999-07-22 Rolm Systems Method and device for connecting additional devices to a digital telephone
CA2086573C (en) 1992-12-31 1996-04-09 Christopher M. Forrester Automatic sidetone selector
US5471650A (en) 1993-01-07 1995-11-28 Northern Telecom Limited Radio link parameter control in wireless personal communications system
US5400397A (en) 1993-01-20 1995-03-21 Matsushita Electric Industrial Co., Ltd. Private automatic branch exchange
US5557672A (en) * 1993-03-10 1996-09-17 Antec Corporation Channel interface unit
US5357569A (en) 1993-05-03 1994-10-18 Teltrend Inc. Trans-hybrid loss compensator for on hook transmission
US5422950A (en) 1993-05-03 1995-06-06 Teltrend Inc. Remote terminal channel unit for telephone transmission lines
US5623544A (en) 1993-05-17 1997-04-22 Vxi Corporation Telephone headset interface circuit
US5544243A (en) 1993-05-17 1996-08-06 Vxi Corporation Telephone headset interface circuit
US5471523A (en) * 1993-07-14 1995-11-28 Voysys Corporation Telephone call and voice processing system
US5444243A (en) 1993-09-01 1995-08-22 Hitachi, Ltd. Wien filter apparatus with hyperbolic surfaces
US5396551A (en) 1993-09-03 1995-03-07 Unex Corporation Headset amplifier
US5448646A (en) * 1993-11-01 1995-09-05 Unex Corporation Headset interface assembly
US5526419A (en) 1993-12-29 1996-06-11 At&T Corp. Background noise compensation in a telephone set
US5621731A (en) * 1994-02-04 1997-04-15 Omnilink Communications Corporation Private exchange for ISDN
US5555300A (en) * 1994-03-07 1996-09-10 Gutzmer; Howard A. Telephone handset microphone level adjustment
US5533119A (en) 1994-05-31 1996-07-02 Motorola, Inc. Method and apparatus for sidetone optimization
US5495527A (en) 1994-06-10 1996-02-27 Ouixote Corporation Telephone privacy device
US5454036A (en) * 1994-06-15 1995-09-26 Gleeman; Alan N. Attended messaging machine
CA2148384C (en) 1994-06-27 2003-03-18 Charles Clifford Hallock Methods for performing intelligent network services with an isdn network terminator located at a subscriber's premise
US5528685A (en) * 1994-07-08 1996-06-18 At&T Corp. Transformerless hybrid circuit
US5550901A (en) * 1994-08-24 1996-08-27 Coherent Communications Systems Corp. Full-duplex adapter for PBX telephone system
US5455859A (en) * 1994-11-28 1995-10-03 Gutzmer; Howard A. Telephone handset interface for device having audio input
US5671251A (en) 1995-02-28 1997-09-23 Motorola, Inc. Apparatus and method for a data communications device to selectively operate as an analog modem, as a digital modem, and as a terminal adapter
US5629926A (en) 1995-03-31 1997-05-13 Lucent Technologies Inc. Customer premise equipment interface
US5577115A (en) * 1995-03-31 1996-11-19 Lucent Technologies Inc. Customer premise equipment interface
US5687228A (en) 1995-08-30 1997-11-11 Plantronics, Inc. Universal amplified telephone handset
EP0782306A3 (en) 1995-12-27 2002-05-29 Siemens Information and Communication Networks, Inc. Interface for providing call control for a headset attached to a telephone
US5734713A (en) 1996-01-30 1998-03-31 Jabra Corporation Method and system for remote telephone calibration
US5892823A (en) * 1996-03-27 1999-04-06 Hello Direct, Inc. Smart interface technology
US5912964A (en) 1996-03-27 1999-06-15 Hello Direct, Inc. Adaptive telephone handset interface
US5625679A (en) * 1996-04-23 1997-04-29 Gutzmer Enterprises, Ltd. Telephone handset interface for alternating voice-data (AVD) modem
US5729603A (en) 1996-09-30 1998-03-17 Plantronics, Inc. Self-configuring telephone interface unit
US6128384A (en) 1997-12-22 2000-10-03 Vxi Corporation Self configuring telephone headset amplifier

Also Published As

Publication number Publication date
CN1214834A (en) 1999-04-21
US5937031A (en) 1999-08-10
CA2245171C (en) 2001-05-15
WO1997036411A3 (en) 1998-05-28
US7831038B1 (en) 2010-11-09
WO1997036411A2 (en) 1997-10-02
DE69730207T2 (en) 2004-12-30
CN1119005C (en) 2003-08-20
EP0890247A2 (en) 1999-01-13
JP3678756B2 (en) 2005-08-03
JP2000504191A (en) 2000-04-04
KR20000004948A (en) 2000-01-25
DE69730207D1 (en) 2004-09-16
KR100275144B1 (en) 2000-12-15
EP0890247B1 (en) 2004-08-11
US5892823A (en) 1999-04-06

Similar Documents

Publication Publication Date Title
CA2245171A1 (en) Smart telecommunications interface
WO1997036411B1 (en) Smart telecommunications interface
US5191602A (en) Cellular telephone headset
JPH06216978A (en) Transmitter-receiver
ZA927681B (en) A cordless local area network.
EP0242030A3 (en) distributed telephone system
CA2358164A1 (en) Telephone handset for mixed-mode voice-and-tdd communication
AU625030B2 (en) Telephone handset including directional microphone module
EP1973373A3 (en) A customer telecommunication interface device having a unique identifier
CA2005972A1 (en) Duplex communications method and system
US4887293A (en) Trunk circuit with loop length gain equalization
AU5917898A (en) Subscriber line interface circuit (slic) simulator
CA2323113A1 (en) Adaptive telephone handset interface
EP0141911A3 (en) Telecommunications apparatus
AU2491588A (en) Digital key telephone system
CA2319696A1 (en) Methods of learning the characteristics of a telephone
EP0251986A3 (en) Telephone line multiplication apparatus with improved ringing generator
BG102676A (en) Terminal for voice telephony and data for radiotelephone network
WO2002035806A3 (en) Display adapter for comfort telephones
CA2283337A1 (en) Activation of multiple xdsl modems with channel probe
ES2103187A1 (en) Two-wire communication system for interphones
AU535624B2 (en) Digital telephone station
CA2038300A1 (en) Telephone system and speech level adjusting method therefor
US7564963B2 (en) Multi-handset telephone system
CA2308012A1 (en) Dnic peripheral extender

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20170327