FR2404355A1 - Dispositif permettant d'amplifier ou de transmettre les signaux recus par un telephone et faisant office d'interphone - Google Patents

Dispositif permettant d'amplifier ou de transmettre les signaux recus par un telephone et faisant office d'interphone

Info

Publication number
FR2404355A1
FR2404355A1 FR7728975A FR7728975A FR2404355A1 FR 2404355 A1 FR2404355 A1 FR 2404355A1 FR 7728975 A FR7728975 A FR 7728975A FR 7728975 A FR7728975 A FR 7728975A FR 2404355 A1 FR2404355 A1 FR 2404355A1
Authority
FR
France
Prior art keywords
loudspeaker
amplifier circuit
reception
telephone
controlled switching
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Withdrawn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
FR7728975A
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.)
PHONINTER SA
Original Assignee
PHONINTER SA
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 PHONINTER SA filed Critical PHONINTER SA
Priority to FR7728975A priority Critical patent/FR2404355A1/fr
Publication of FR2404355A1 publication Critical patent/FR2404355A1/fr
Withdrawn legal-status Critical Current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
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

Dispositif électronique destiné d'une part, à amplifier les signaux émis ou transmis par un téléphone, d'autre part à établir une conversation entre plusieurs interlocuteurs situés en des lieux plus ou moins éloignés et permettant enfin la transmission d'un entretien téléphonique vers un lieu distant de celui où est disposé l'appareil téléphonique. Ces trois fonctions sont combinées en un seul élément compact associé au susdit appareil téléphonique, leur commutation s'opérant cycliquement à l'aide d'un compteur logique 6 qui bloque ou libère les chaînes d'amplification concernées et notamment les chaînes 10a et 10b sous l'effet d'impulsions transmises par un moyen mécanique tel qu'un touche fugitive 30 ou par un moyen électronique ou encore sous l'effet d'informations sonores retenues à partir d'un seuil d'intensité acoustique donné.
FR7728975A 1977-09-21 1977-09-21 Dispositif permettant d'amplifier ou de transmettre les signaux recus par un telephone et faisant office d'interphone Withdrawn FR2404355A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7728975A FR2404355A1 (fr) 1977-09-21 1977-09-21 Dispositif permettant d'amplifier ou de transmettre les signaux recus par un telephone et faisant office d'interphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7728975A FR2404355A1 (fr) 1977-09-21 1977-09-21 Dispositif permettant d'amplifier ou de transmettre les signaux recus par un telephone et faisant office d'interphone

Publications (1)

Publication Number Publication Date
FR2404355A1 true FR2404355A1 (fr) 1979-04-20

Family

ID=9195792

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7728975A Withdrawn FR2404355A1 (fr) 1977-09-21 1977-09-21 Dispositif permettant d'amplifier ou de transmettre les signaux recus par un telephone et faisant office d'interphone

Country Status (1)

Country Link
FR (1) FR2404355A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2210872A1 (fr) * 1972-12-18 1974-07-12 Ericsson Telefon Ab L M
US4049911A (en) * 1976-01-06 1977-09-20 Norcon Electronics Inc. Talk-through unit with voice controlled switching with turn off delay variable from 250-500 milliseconds depending on voice amplitude
FR2363239A1 (fr) * 1976-08-25 1978-03-24 Dasy Int Sa Disposition de circuit pour un systeme telephonique d'interphone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2210872A1 (fr) * 1972-12-18 1974-07-12 Ericsson Telefon Ab L M
US4049911A (en) * 1976-01-06 1977-09-20 Norcon Electronics Inc. Talk-through unit with voice controlled switching with turn off delay variable from 250-500 milliseconds depending on voice amplitude
FR2363239A1 (fr) * 1976-08-25 1978-03-24 Dasy Int Sa Disposition de circuit pour un systeme telephonique d'interphone

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Legal Events

Date Code Title Description
ST Notification of lapse