[go: up one dir, main page]

FR2359561A1 - Dispositif pour la reception de signaux de signalisation a frequences vocales - Google Patents

Dispositif pour la reception de signaux de signalisation a frequences vocales

Info

Publication number
FR2359561A1
FR2359561A1 FR7722066A FR7722066A FR2359561A1 FR 2359561 A1 FR2359561 A1 FR 2359561A1 FR 7722066 A FR7722066 A FR 7722066A FR 7722066 A FR7722066 A FR 7722066A FR 2359561 A1 FR2359561 A1 FR 2359561A1
Authority
FR
France
Prior art keywords
signals
signal
receives
reception unit
audio frequencies
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.)
Withdrawn
Application number
FR7722066A
Other languages
English (en)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2359561A1 publication Critical patent/FR2359561A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Dispositif de réception utilisé dans des systèmes de signalisation par fréquences vocales et muni d'un détecteur de signaux de conversation qui, du fait de comparer la moyenne des valeurs absolues des signaux de sortie à l'amplitude maximale de ces signaux, définit si les signaux d'entrée sont formés par une seule composante de signal sinusoïdale ou par plusieurs composantes de ce genre Application aux systèmes de signalisation par registre(s).
FR7722066A 1976-07-20 1977-07-19 Dispositif pour la reception de signaux de signalisation a frequences vocales Withdrawn FR2359561A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7608047A NL7608047A (nl) 1976-07-20 1976-07-20 Ontvanginrichting voor toonfrequente tekens.

Publications (1)

Publication Number Publication Date
FR2359561A1 true FR2359561A1 (fr) 1978-02-17

Family

ID=19826629

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7722066A Withdrawn FR2359561A1 (fr) 1976-07-20 1977-07-19 Dispositif pour la reception de signaux de signalisation a frequences vocales

Country Status (7)

Country Link
JP (1) JPS5313810A (fr)
BE (1) BE856903A (fr)
BR (1) BR7704723A (fr)
DE (1) DE2730453A1 (fr)
FR (1) FR2359561A1 (fr)
NL (1) NL7608047A (fr)
SE (1) SE7708218L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228096A2 (fr) * 1985-12-31 1987-07-08 Wang Laboratories Inc. Détecteur et discriminateur d'un signal utilisant le facteur de crête de forme d'ondes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228096A2 (fr) * 1985-12-31 1987-07-08 Wang Laboratories Inc. Détecteur et discriminateur d'un signal utilisant le facteur de crête de forme d'ondes
EP0228096A3 (en) * 1985-12-31 1989-03-29 Wang Laboratories Inc. Signal detection and discrimination using waveform peak factor

Also Published As

Publication number Publication date
BR7704723A (pt) 1978-05-16
BE856903A (fr) 1978-01-18
DE2730453A1 (de) 1978-01-26
JPS5313810A (en) 1978-02-07
NL7608047A (nl) 1978-01-24
SE7708218L (sv) 1978-01-21

Similar Documents

Publication Publication Date Title
ZA762946B (en) Systems and devices for detecting the presence and/or absence of useful signal(speech)on telephone lines(voice channel)
KR860007806A (ko) 저이득 상태의 스피커폰 제어회로 및 스피커폰의 이득 제어 방법
SE9202065L (sv) Sätt att förbättra mottagarens känslighet och talimmuniteten vid DTMF-mottagning
SE8201876L (sv) Brusdetektor
GB1431922A (en) Terminal equipment for a telephone system
FR2359561A1 (fr) Dispositif pour la reception de signaux de signalisation a frequences vocales
US6141426A (en) Voice operated switch for use in high noise environments
ES456619A1 (es) Un aparato receptor perfeccionado para la detencion de al menos dos frecuencias vocales de una senal de tono.
FR2271725A1 (en) Telephonic conference system with speech detector - enables speech from one participant to block all other transmissions
JPS5647139A (en) Optical transmitting signal-break detecting circuit
US3993875A (en) Tone receiver
CA2000026A1 (fr) Dispositif de confirmation de numerotation par une tonalite
FR2369753A1 (fr) Circuit
JPS5784628A (en) Mobile radio device
FR2271726A1 (en) Telephonic conference system with speech detector - enables speech from one participant to block all other transmissions
SU809665A1 (ru) Приемник тонального набора
IE42234L (en) Coding an analog signal
JPS6481535A (en) Communication equipment
JPS642455A (en) Automatic level control circuit
SU1146794A1 (ru) Автоматический регул тор громкости дл звуковоспроизвод щих устройств
JP3046337B2 (ja) 通話検出器
JPS5245804A (en) Telephone memo recording method
JPS5741051A (en) Voice muting circuit
JPS57133733A (en) Measuring device for digital transmission characteristics
GB1532103A (en) Method and apparatus for translating multiple frequency signalling

Legal Events

Date Code Title Description
ST Notification of lapse