DE69115794T2 - Anordnung zur Zustandsumschaltung für Lautfernsprechgerät - Google Patents

Anordnung zur Zustandsumschaltung für Lautfernsprechgerät

Info

Publication number
DE69115794T2
DE69115794T2 DE69115794T DE69115794T DE69115794T2 DE 69115794 T2 DE69115794 T2 DE 69115794T2 DE 69115794 T DE69115794 T DE 69115794T DE 69115794 T DE69115794 T DE 69115794T DE 69115794 T2 DE69115794 T2 DE 69115794T2
Authority
DE
Germany
Prior art keywords
speakerphone
switching
arrangement
state
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 - Fee Related
Application number
DE69115794T
Other languages
English (en)
Other versions
DE69115794D1 (de
Inventor
Norman Wesley Petty
Thomas John Tierney
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.)
AT&T Corp
Original Assignee
AT&T Corp
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 AT&T Corp filed Critical AT&T Corp
Application granted granted Critical
Publication of DE69115794D1 publication Critical patent/DE69115794D1/de
Publication of DE69115794T2 publication Critical patent/DE69115794T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
DE69115794T 1990-08-01 1991-07-22 Anordnung zur Zustandsumschaltung für Lautfernsprechgerät Expired - Fee Related DE69115794T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/561,034 US5172408A (en) 1990-08-01 1990-08-01 Speakerphone state-controlled alerting arrangement

Publications (2)

Publication Number Publication Date
DE69115794D1 DE69115794D1 (de) 1996-02-08
DE69115794T2 true DE69115794T2 (de) 1996-05-23

Family

ID=24240377

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69115794T Expired - Fee Related DE69115794T2 (de) 1990-08-01 1991-07-22 Anordnung zur Zustandsumschaltung für Lautfernsprechgerät

Country Status (6)

Country Link
US (1) US5172408A (de)
EP (1) EP0472289B1 (de)
JP (1) JP2523237B2 (de)
CA (1) CA2042786C (de)
DE (1) DE69115794T2 (de)
HK (1) HK124196A (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269500B (en) * 1992-07-02 1996-02-07 Motorola Israel Ltd Radio communications device
US5526416A (en) * 1992-11-16 1996-06-11 Dezonno; Anthony J. Automatic call distribution system with an ISDN compatible call connection system and method
US5404582A (en) * 1992-11-27 1995-04-04 Motorola, Inc. Aural annunciator circuit for a receiver
JP3508776B2 (ja) * 1993-01-14 2004-03-22 ソニー株式会社 送受信機
JPH06338934A (ja) * 1993-05-25 1994-12-06 Exar Corp 事象駆動型制御回路を有するスピーカーホーン
US5572587A (en) * 1995-03-08 1996-11-05 Advanced Micro Devices Telephone system and method for easing wait time in queue
DE19610063C2 (de) * 1996-03-14 2000-07-13 Siemens Ag Verfahren und Anordnung zum Erzeugen von Tönen in einem drahtlosen Telekommunikationssystem
US5768363A (en) * 1996-06-11 1998-06-16 Lucent Technologies Inc. Programmable timer circuit for the signal generator of a communication device
FR2768580A1 (fr) * 1997-09-17 1999-03-19 Philips Electronics Nv Utilisation d'un annuleur d'echo pour la detection des signaux cas
US5943407A (en) * 1997-12-16 1999-08-24 Lucent Techologies Inc. Performance enhancement of tone detection and FSK detection using hybrid echo cancellation
DE69835417T2 (de) * 1997-12-23 2007-07-05 Koninklijke Philips Electronics N.V. Anmeldungsverfahren und vorrichtung mit sprachmitteilungen von ereignissen über einen sprachkanal
TW200713015A (en) * 2005-09-19 2007-04-01 High Tech Comp Corp Method for arbitrating audio signal output
WO2008003271A1 (de) 2006-07-06 2008-01-10 Siemens Aktiengesellschaft Schaltungsanordnung und verfahren zur erzeugung eines hörtons sowie kommunikationsendgerät
US8311590B2 (en) * 2006-12-05 2012-11-13 Hewlett-Packard Development Company, L.P. System and method for improved loudspeaker functionality
US10297127B1 (en) * 2017-12-18 2019-05-21 Arris Enterprises Llc Home security systems and Bluetooth Wi-Fi embedded set-tops and modems

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH369172A (de) * 1954-02-08 1963-05-15 Standard Telephon & Radio Ag Telephonteilnehmerstation
FR2235556B1 (de) * 1973-06-28 1978-09-08 Person Jean Michel
CA1058340A (en) * 1975-06-30 1979-07-10 International Standard Electric Corporation Two-way loudspeaking device for telephone stations
US4185173A (en) * 1976-10-01 1980-01-22 Nippon Tsu Shin Kogyo K.K. Key telephone call signalling circuit
US4315109A (en) * 1979-11-20 1982-02-09 Sava Jacobson Electronic ring sounder for a speaker telephone
US4400581A (en) * 1980-11-03 1983-08-23 Sava Jacobson Incoming audio detection circuit for a speaker telephone
JPS57173457U (de) * 1981-04-24 1982-11-01
FR2532133A1 (fr) * 1982-08-17 1984-02-24 Labo Cent Telecommunicat Circuit de sonnerie pour poste telephonique, realisable en circuit integre
US4497980A (en) * 1983-06-16 1985-02-05 Itt Corporation Handsfree circuit for telephone instrument
GB8317706D0 (en) * 1983-06-29 1983-08-03 Standard Telephones Cables Ltd Telephone subsets
US4677661A (en) * 1983-10-07 1987-06-30 Baccaret Teledex, Inc. Microprocessor controlled telephone unit
US4523058A (en) * 1983-10-24 1985-06-11 Uniden Corporation Of America Ringer signal wave shaping circuit
US4716585A (en) * 1985-04-05 1987-12-29 Datapoint Corporation Gain switched audio conferencing network
JPS6229227A (ja) * 1985-07-29 1987-02-07 Nec Corp 会議電話装置
US4700382A (en) * 1986-03-03 1987-10-13 American Telephone And Telegraph Company, At&T Information Systems, Inc. Voice-switched telephone circuit with center idle state
JPH0683305B2 (ja) * 1987-03-12 1994-10-19 日本電気株式会社 拡声電話機
JP2751244B2 (ja) * 1988-02-18 1998-05-18 日本電気株式会社 ハンズフリー回路及びハンズフリー制御方式
FR2641150B1 (de) * 1988-12-28 1991-04-19 Sgs Thomson Microelectronics

Also Published As

Publication number Publication date
CA2042786C (en) 1995-03-28
EP0472289A2 (de) 1992-02-26
EP0472289B1 (de) 1995-12-27
JP2523237B2 (ja) 1996-08-07
EP0472289A3 (de) 1992-03-11
DE69115794D1 (de) 1996-02-08
US5172408A (en) 1992-12-15
HK124196A (en) 1996-07-19
JPH04234253A (ja) 1992-08-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee