WO1997036411B1 - Smart telecommunications interface - Google Patents
Smart telecommunications interfaceInfo
- Publication number
- WO1997036411B1 WO1997036411B1 PCT/US1997/006085 US9706085W WO9736411B1 WO 1997036411 B1 WO1997036411 B1 WO 1997036411B1 US 9706085 W US9706085 W US 9706085W WO 9736411 B1 WO9736411 B1 WO 9736411B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contacts
- interface
- accessory
- signal
- telecommunications
- Prior art date
Links
- 230000001808 coupling Effects 0.000 claims 4
- 238000010168 coupling process Methods 0.000 claims 4
- 238000005859 coupling reaction Methods 0.000 claims 4
- 230000001939 inductive effect Effects 0.000 claims 2
- 230000035945 sensitivity Effects 0.000 abstract 1
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 approrpriate 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.
Claims
AMENDED CLAIMS
[received by the International Bureau on 10 April 1998 (10.04.98); original claims 1 and 2 amended; new claim 41 added; remaining claims unchanged (2 pages)]
1. A telecommunications interface system that automatically configures ,α accessory having a predetermined number of electrical acce$sory contacts to appropriately interface with a telephone base unit having a plurality of electr cal contacts, including two electrical output contacts, wherein the interface systei n is configured for coupling the output contacts to a predetermined pair of the ac ;essory contacts, the interface comprising: a. an interface port having the predetermined number of accessory contacts, wherein the port receives an input signal from the output contacts on two of the accessory contacts; b. a signal processing circuit having two signal inputs coupled for receiving the input signal from the interface port; and c. a directing circuit coupled between the interface port and the signal processing circuit for electrically coupling the output contacts to the .- ignal inputs wherem the output contacts are automatically selected from the plurality of electrical contacts according to a sensed signal received from the telephone base.
2. The telecommunications interface system according to ciaim 41 wherein die plurality of electrical contacts further comprises two electrical input contacts wherein the interface system is configured for coupling the input contacts to a predetemiined pair of the accessory contacts, a. the signal processing circuit further comprising two signal outputs coupled for providing an output signal; b. the interface port further comprising mε:ans for receiving the output ; ignal from the signal outputs on two of the accessory contacts; and c. the directing circuit further comprising means for electrically coupling the signal outputs to the input contacts.
- 29
w. a bandgap filter coupled between the sleep and system power supp'y circuit and the controller for providing a stable reference signal to the controller.
34. The telecommunicatioris system according to claim 33 wherein the load is inductive.
35. The telecommunications system according to claim 34 wherein the ind ictive load is a headset.
36. The telecommunications system according to claim 34 wherein the inductive load is a handset.
37. The telecommunications system according to claim 33 wherein the lo∑id is capacitive.
38. The telecor munications system according to claim 33 wherein the load is resistive.
39. The telecommunications system according to claim 33 wherein the accessory is a voice accessory.
40. The telecommunications system according to claim 33 wherein the accessory is a data accessory.
41. The telecommunications interface system according to claim 1 wherέ in the sensed signal is a dial tone signal.
30 -
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK97921160T DK0890247T3 (en) | 1997-03-27 | 1997-03-27 | Smart interface technology |
DE69730207T DE69730207T2 (en) | 1996-03-27 | 1997-03-27 | INTELLIGENT TELECOMMUNICATION INTERFACE |
EP97921160A EP0890247B1 (en) | 1996-03-27 | 1997-03-27 | Smart interface technology |
KR1019980707539A KR100275144B1 (en) | 1996-03-27 | 1997-03-27 | Smart telecommunication interface |
CA002245171A CA2245171C (en) | 1996-03-27 | 1997-03-27 | Smart telecommunications interface |
JP53469797A JP3678756B2 (en) | 1996-03-27 | 1997-03-27 | Telecommunications interface system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/625,398 US5892823A (en) | 1996-03-27 | 1996-03-27 | Smart interface technology |
US08/625,398 | 1996-03-27 |
Publications (4)
Publication Number | Publication Date |
---|---|
WO1997036411A2 WO1997036411A2 (en) | 1997-10-02 |
WO1997036411A9 WO1997036411A9 (en) | 1997-12-11 |
WO1997036411B1 true WO1997036411B1 (en) | 1998-05-28 |
WO1997036411A3 WO1997036411A3 (en) | 1998-05-28 |
Family
ID=24505893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/006085 WO1997036411A2 (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 (26)
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 |
DE60035702T2 (en) * | 1999-11-19 | 2008-04-30 | Hello Direct Inc., San Jose | METHOD AND DEVICE FOR INTERFACING A TELEPHONE DEVICE AND A DIGITAL, ANALOG OR HYBRID MEDIATION SYSTEM |
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 |
AU2003265205A1 (en) * | 2003-08-29 | 2005-03-16 | 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 |
DE102014225876A1 (en) * | 2014-12-15 | 2016-07-28 | Ziehl-Abegg Se | Input stage for a motor control and motor control, in particular for an electric motor |
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)
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 |
US5003580A (en) * | 1986-09-16 | 1991-03-26 | Standard Telephones And Cables Pty. Ltd. | Adapter for interfacing a work station terminal to a key telephone system |
EP0264018A1 (en) * | 1986-09-30 | 1988-04-20 | Siemens Aktiengesellschaft | Method for the control of the amplification in telephone apparatuses with an electronic speech circuit, and device for carrying out this method |
JP2750414B2 (en) | 1986-12-01 | 1998-05-13 | ブリティシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニ | Bidirectional data transmission method and apparatus, and bidirectional data transmission station |
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 |
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 |
US4852160A (en) * | 1987-03-03 | 1989-07-25 | Kiko Frederick J | Channel unit interface circuit |
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 |
US4852153A (en) * | 1988-03-18 | 1989-07-25 | Jerry R. Iggulden | Single line master telephone with FAX connection |
US4856049A (en) * | 1988-03-18 | 1989-08-08 | Jerry R. Iggulden | Single line compatible fax system |
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 |
DE69030777T2 (en) * | 1989-03-03 | 1998-01-08 | Nippon Telegraph & Telephone | Network terminal |
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 |
DE59003360D1 (en) * | 1990-03-27 | 1993-12-09 | Siemens Ag | Two-wire to four-wire converter. |
EP0448754B1 (en) * | 1990-03-27 | 1993-11-03 | Siemens Aktiengesellschaft | Two-wire-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 |
US5323449A (en) * | 1990-08-23 | 1994-06-21 | Nec Corporation | 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 |
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 |
US5473676A (en) * | 1990-09-27 | 1995-12-05 | 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 |
US5493609A (en) * | 1990-09-27 | 1996-02-20 | Radish Communications Systems, Inc. | Telecommunication system for automatic switching between voice and data communications |
US5365577A (en) * | 1990-09-27 | 1994-11-15 | 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 |
US5239579A (en) | 1991-01-04 | 1993-08-24 | Schuh Peter O | Adaptive amplifier circuit |
US5170430A (en) * | 1991-01-04 | 1992-12-08 | Schuh Peter O | Voice-switched handset receive amplifier |
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 |
WO1993012622A1 (en) * | 1991-12-09 | 1993-06-24 | 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 |
US5249218A (en) * | 1992-04-06 | 1993-09-28 | Spectrum Information Technologies, Inc. | Programmable universal interface system |
US5229721A (en) | 1992-04-06 | 1993-07-20 | Plantronics, Inc. | Micropower amplifier/transducer driver with signal expansion |
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 |
US5577115A (en) * | 1995-03-31 | 1996-11-19 | Lucent Technologies Inc. | Customer premise equipment interface |
US5629926A (en) | 1995-03-31 | 1997-05-13 | 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 |
US5912964A (en) | 1996-03-27 | 1999-06-15 | Hello Direct, Inc. | Adaptive telephone handset interface |
US5892823A (en) * | 1996-03-27 | 1999-04-06 | Hello Direct, Inc. | Smart interface technology |
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 |
-
1996
- 1996-03-27 US US08/625,398 patent/US5892823A/en not_active Expired - Lifetime
-
1997
- 1997-03-27 CA CA002245171A patent/CA2245171C/en not_active Expired - Fee Related
- 1997-03-27 JP JP53469797A patent/JP3678756B2/en not_active Expired - Fee Related
- 1997-03-27 WO PCT/US1997/006085 patent/WO1997036411A2/en active IP Right Grant
- 1997-03-27 KR KR1019980707539A patent/KR100275144B1/en not_active IP Right Cessation
- 1997-03-27 EP EP97921160A patent/EP0890247B1/en not_active Expired - Lifetime
- 1997-03-27 DE DE69730207T patent/DE69730207T2/en not_active Expired - Lifetime
- 1997-03-27 CN CN97193441A patent/CN1119005C/en not_active Expired - Fee Related
-
1998
- 1998-07-29 US US09/124,687 patent/US5937031A/en not_active Expired - Lifetime
-
1999
- 1999-04-05 US US09/286,249 patent/US7831038B1/en not_active Expired - Fee Related
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1997036411B1 (en) | Smart telecommunications interface | |
WO1997036411A3 (en) | Smart telecommunications interface | |
US5991640A (en) | Docking and electrical interface for personal use communication devices | |
US5455859A (en) | Telephone handset interface for device having audio input | |
WO1990003076A1 (en) | Method and apparatus for controlling transmission of voice and data signals | |
JPH06216978A (en) | Transmitter-receiver | |
WO1997036411A9 (en) | Smart telecommunications interface | |
WO1998015097A1 (en) | Self-configuring telephone interface unit | |
US5495527A (en) | Telephone privacy device | |
US6683952B1 (en) | Headset adapter with detachable under-the-phone accessory deck | |
KR19990087732A (en) | Mobile Phone Adapter | |
US20030104845A1 (en) | Hand free device commonly shared by multiple communication devices | |
WO1998058454A2 (en) | A docking station | |
WO2000007345A1 (en) | Switching of analog signals in mobile computing devices | |
CA2319696A1 (en) | Methods of learning the characteristics of a telephone | |
JP3192870B2 (en) | Cordless telephone | |
WO2001003413A2 (en) | Interphone apparatus with connection to a cellular telephone | |
KR20030088786A (en) | Mobile communication terminal | |
KR200193536Y1 (en) | Apparatus for connecting computer and conventional telephone for internet telephone usage | |
CN2448017Y (en) | Wireless telephone fixing terminal arrangement with secondary phone | |
CA2086387A1 (en) | Audio circuit board for a modular digital voice processing system | |
JP2647545B2 (en) | Communication device using cordless telephone | |
KR0170034B1 (en) | Keyphone having receiving signal compensating function by digital control | |
JPS6167394A (en) | Parallel connection device of key telephone set | |
CA2317383A1 (en) | Subscriber line interface circuit |