IT1014614B - Circuito per rivelare la presenza di attivita in banda fonica in una giunzione telefonica - Google Patents
Circuito per rivelare la presenza di attivita in banda fonica in una giunzione telefonicaInfo
- Publication number
- IT1014614B IT1014614B IT21869/74A IT2186974A IT1014614B IT 1014614 B IT1014614 B IT 1014614B IT 21869/74 A IT21869/74 A IT 21869/74A IT 2186974 A IT2186974 A IT 2186974A IT 1014614 B IT1014614 B IT 1014614B
- Authority
- IT
- Italy
- Prior art keywords
- activity
- detecting
- circuit
- phone band
- telephone
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/17—Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
- H04J3/175—Speech activity or inactivity detectors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Time-Division Multiplex Systems (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Interface Circuits In Exchanges (AREA)
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT21869/74A IT1014614B (it) | 1974-04-24 | 1974-04-24 | Circuito per rivelare la presenza di attivita in banda fonica in una giunzione telefonica |
FR7501816A FR2269247B1 (US08124630-20120228-C00152.png) | 1974-04-24 | 1975-01-21 | |
BE153361A BE825536A (fr) | 1974-04-24 | 1975-02-14 | Procede de detection de la presence d'activite dans la bande phonique dans une jonction telephonique et circuit pour la mise en oeuvre de ce procede |
BR2114/75A BR7501653A (pt) | 1974-04-24 | 1975-03-20 | Processo de detecao da presenca de atividade de faixa de voz numa ligacao telefonica e circuito de detecao para conduzir o processo |
ES435939A ES435939A1 (es) | 1974-04-24 | 1975-03-24 | Perfeccionamientos en los circuitos para detectar la pre- sencia de actividad en banda fonica en una conexion telefo- nica. |
JP50045398A JPS50140208A (US08124630-20120228-C00152.png) | 1974-04-24 | 1975-04-16 | |
GB15605/75A GB1501726A (en) | 1974-04-24 | 1975-04-16 | Detecting the presence of speech band activity in telephone connections |
AU80389/75A AU495301B2 (en) | 1974-04-24 | 1975-04-22 | Method for detecting the presence of speech band activity ina telephone connection anda circuit for carrying out such method |
NL7504782A NL7504782A (nl) | 1974-04-24 | 1975-04-22 | Werkwijze voor het detecteren van de aanwezig- heid van spraakbandaktiviteit in een telefoon- verbinding en circuit voor het uitvoeren van die werkwijze. |
DK174275A DK174275A (da) | 1974-04-24 | 1975-04-23 | Fremgangsmade til detektering af taleaktivitet samt kredslob til udovelse af fremgangsmaden |
US05/570,581 US3985956A (en) | 1974-04-24 | 1975-04-23 | Method of and means for detecting voice frequencies in telephone system |
CA225,253A CA1047658A (en) | 1974-04-24 | 1975-04-23 | Method for detecting the presence of speech band activity in a telephone connection and a circuit for carrying out such method |
SE7504752A SE7504752L (sv) | 1974-04-24 | 1975-04-24 | Talindikator |
DE19752518320 DE2518320A1 (de) | 1974-04-24 | 1975-04-24 | Verfahren und detektorschaltung zum feststellen einer signalaktivitaet im tonfrequenzbereich bei einer fernsprechverbindungsleitung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT21869/74A IT1014614B (it) | 1974-04-24 | 1974-04-24 | Circuito per rivelare la presenza di attivita in banda fonica in una giunzione telefonica |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1014614B true IT1014614B (it) | 1977-04-30 |
Family
ID=11188002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT21869/74A IT1014614B (it) | 1974-04-24 | 1974-04-24 | Circuito per rivelare la presenza di attivita in banda fonica in una giunzione telefonica |
Country Status (13)
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4061878A (en) * | 1976-05-10 | 1977-12-06 | Universite De Sherbrooke | Method and apparatus for speech detection of PCM multiplexed voice channels |
US4171466A (en) * | 1977-05-16 | 1979-10-16 | Bell Telephone Laboratories, Incorporated | Digital wave generator for composite tone |
US4314100A (en) * | 1980-01-24 | 1982-02-02 | Storage Technology Corporation | Data detection circuit for a TASI system |
DE3116373C2 (de) * | 1981-04-16 | 1983-01-20 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Anzeige einer Sende- und Empfangs-Signalinformation an einer optischen Auswerteeinrichtung |
DE3220905C1 (de) * | 1982-06-03 | 1983-12-29 | Vierling, Oskar, Prof. Dr.Phil.Habil., 8553 Ebermannstadt | Sensor zur Verkehrserfassung von aus Analogsignalen bestehenden Nachrichtenströmen auf Fernmeldeleitungen |
DE3323534C1 (de) * | 1983-06-30 | 1985-02-14 | Vierling, Oskar, Prof. Dr.Phil.Habil., 8553 Ebermannstadt | Sensor zur Verkehrserfassung von aus Analogsignalen bestehenden Nachrichtenströmen auf Fernmeldeleitungen |
US4667065A (en) * | 1985-02-28 | 1987-05-19 | Bangerter Richard M | Apparatus and methods for electrical signal discrimination |
US4764966A (en) * | 1985-10-11 | 1988-08-16 | International Business Machines Corporation | Method and apparatus for voice detection having adaptive sensitivity |
US4742537A (en) * | 1986-06-04 | 1988-05-03 | Electronic Information Systems, Inc. | Telephone line monitoring system |
JPH07113840B2 (ja) * | 1989-06-29 | 1995-12-06 | 三菱電機株式会社 | 音声検出器 |
JP2609752B2 (ja) * | 1990-10-09 | 1997-05-14 | 三菱電機株式会社 | 音声/音声帯域内データ識別装置 |
DE4127295A1 (de) * | 1991-08-17 | 1993-02-18 | Koelchens Gert Dipl Ing | Spracherkennungsschalter |
US5805685A (en) * | 1995-11-15 | 1998-09-08 | Gateway Technologies, Inc. | Three way call detection by counting signal characteristics |
US5796811A (en) * | 1995-11-15 | 1998-08-18 | Gateway Technologies, Inc. | Three way call detection |
US7505406B1 (en) | 2001-07-13 | 2009-03-17 | Evercom Systems, Inc. | Public telephone control with voice over internet protocol transmission |
US8000269B1 (en) | 2001-07-13 | 2011-08-16 | Securus Technologies, Inc. | Call processing with voice over internet protocol transmission |
US7899167B1 (en) | 2003-08-15 | 2011-03-01 | Securus Technologies, Inc. | Centralized call processing |
US9020114B2 (en) | 2002-04-29 | 2015-04-28 | Securus Technologies, Inc. | Systems and methods for detecting a call anomaly using biometric identification |
US7860222B1 (en) | 2003-11-24 | 2010-12-28 | Securus Technologies, Inc. | Systems and methods for acquiring, accessing, and analyzing investigative information |
US7916845B2 (en) | 2006-04-13 | 2011-03-29 | Securus Technologies, Inc. | Unauthorized call activity detection and prevention systems and methods for a Voice over Internet Protocol environment |
US9026468B2 (en) | 2002-04-29 | 2015-05-05 | Securus Technologies, Inc. | System and method for proactively establishing a third-party payment account for services rendered to a resident of a controlled-environment facility |
EP1385014B1 (en) * | 2002-07-25 | 2006-02-08 | Agilent Technologies Inc. a Delaware Corporation | Signal sampling with sampling and reference paths |
US7529357B1 (en) | 2003-08-15 | 2009-05-05 | Evercom Systems, Inc. | Inmate management and call processing systems and methods |
US8542802B2 (en) | 2007-02-15 | 2013-09-24 | Global Tel*Link Corporation | System and method for three-way call detection |
US10796392B1 (en) | 2007-05-22 | 2020-10-06 | Securus Technologies, Llc | Systems and methods for facilitating booking, bonding and release |
US9225838B2 (en) | 2009-02-12 | 2015-12-29 | Value-Added Communications, Inc. | System and method for detecting three-way call circumvention attempts |
US9930088B1 (en) | 2017-06-22 | 2018-03-27 | Global Tel*Link Corporation | Utilizing VoIP codec negotiation during a controlled environment call |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1170306A (en) * | 1967-11-16 | 1969-11-12 | Standard Telephones Cables Ltd | Apparatus for Analysing Complex Waveforms |
US3513260A (en) * | 1967-10-13 | 1970-05-19 | Ibm | Speech presence detector |
US3712959A (en) * | 1969-07-14 | 1973-01-23 | Communications Satellite Corp | Method and apparatus for detecting speech signals in the presence of noise |
US3878337A (en) * | 1970-03-13 | 1975-04-15 | Communications Satellite Corp | Device for speech detection independent of amplitude |
-
1974
- 1974-04-24 IT IT21869/74A patent/IT1014614B/it active
-
1975
- 1975-01-21 FR FR7501816A patent/FR2269247B1/fr not_active Expired
- 1975-02-14 BE BE153361A patent/BE825536A/xx unknown
- 1975-03-20 BR BR2114/75A patent/BR7501653A/pt unknown
- 1975-03-24 ES ES435939A patent/ES435939A1/es not_active Expired
- 1975-04-16 JP JP50045398A patent/JPS50140208A/ja active Pending
- 1975-04-16 GB GB15605/75A patent/GB1501726A/en not_active Expired
- 1975-04-22 NL NL7504782A patent/NL7504782A/xx not_active Application Discontinuation
- 1975-04-23 DK DK174275A patent/DK174275A/da active IP Right Grant
- 1975-04-23 US US05/570,581 patent/US3985956A/en not_active Expired - Lifetime
- 1975-04-23 CA CA225,253A patent/CA1047658A/en not_active Expired
- 1975-04-24 SE SE7504752A patent/SE7504752L/xx unknown
- 1975-04-24 DE DE19752518320 patent/DE2518320A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE2518320A1 (de) | 1975-11-20 |
US3985956A (en) | 1976-10-12 |
DK174275A (da) | 1975-10-25 |
AU8038975A (en) | 1976-10-28 |
BE825536A (fr) | 1975-05-29 |
ES435939A1 (es) | 1976-12-16 |
JPS50140208A (US08124630-20120228-C00152.png) | 1975-11-10 |
NL7504782A (nl) | 1975-10-28 |
CA1047658A (en) | 1979-01-30 |
FR2269247B1 (US08124630-20120228-C00152.png) | 1979-08-24 |
FR2269247A1 (US08124630-20120228-C00152.png) | 1975-11-21 |
BR7501653A (pt) | 1976-03-09 |
SE7504752L (sv) | 1975-10-27 |
GB1501726A (en) | 1978-02-22 |
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