FR2496377B1 - - Google Patents

Info

Publication number
FR2496377B1
FR2496377B1 FR8120802A FR8120802A FR2496377B1 FR 2496377 B1 FR2496377 B1 FR 2496377B1 FR 8120802 A FR8120802 A FR 8120802A FR 8120802 A FR8120802 A FR 8120802A FR 2496377 B1 FR2496377 B1 FR 2496377B1
Authority
FR
France
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
Application number
FR8120802A
Other languages
French (fr)
Other versions
FR2496377A1 (fr
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.)
URMET SpA
Original Assignee
URMET SpA
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 URMET SpA filed Critical URMET SpA
Publication of FR2496377A1 publication Critical patent/FR2496377A1/fr
Application granted granted Critical
Publication of FR2496377B1 publication Critical patent/FR2496377B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186—Video door telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025—Door telephones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Closed-Circuit Television Systems (AREA)
FR8120802A 1980-12-15 1981-11-06 Installation de portier telephonique avec transmission d'image, qui emploie quatre conducteurs communs et un conducteur de selection pour chaque poste interieur Granted FR2496377A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT68903/80A IT1165528B (it) 1980-12-15 1980-12-15 Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto interno

Publications (2)

Publication Number Publication Date
FR2496377A1 FR2496377A1 (fr) 1982-06-18
FR2496377B1 true FR2496377B1 (enrdf_load_stackoverflow) 1985-03-29

Family

ID=11310869

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8120802A Granted FR2496377A1 (fr) 1980-12-15 1981-11-06 Installation de portier telephonique avec transmission d'image, qui emploie quatre conducteurs communs et un conducteur de selection pour chaque poste interieur

Country Status (4)

Country Link
DE (1) DE3139594A1 (enrdf_load_stackoverflow)
ES (1) ES507959A0 (enrdf_load_stackoverflow)
FR (1) FR2496377A1 (enrdf_load_stackoverflow)
IT (1) IT1165528B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1160803B (it) * 1983-03-11 1987-03-11 Comelit Cie Elettronica Italia Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1926314A1 (de) * 1969-03-07 1970-11-26 Heider Gmbh Schaltungsanordnung fuer kombinierte Tuersprech- und OEffneranlagen in Mehrwohnungshaeusern
DE2126180A1 (de) * 1970-09-09 1972-03-16 Barbuti O Gegensprechgerät
DE2165904B1 (de) * 1971-12-31 1973-06-28 Kathrein-Werke Kg, 8200 Rosenheim Anlage zur Mehrfachausnutzung von Signalleitungen in Gebäuden
DE2306109A1 (de) * 1972-03-23 1973-10-04 Ottorino Barbuti Gegensprechgeraet
DE2239053B2 (de) * 1972-08-08 1974-07-25 Kathrein-Werke Kg, 8200 Rosenheim Anlage zur Mehrfachausnutzung von Signalleitungen in Gebäuden, mit einer Fernseh-Gemeinschaftsantenne
FR2214213A1 (enrdf_load_stackoverflow) * 1973-01-11 1974-08-09 Diela Ste Expl Ets
DE2741160C2 (de) * 1977-09-13 1985-05-09 S. Siedle & Söhne Telefon- und Telegrafenwerke GmbH, 7743 Furtwangen Schaltungsanordnung für eine Ruf-, Türwechselsprech- und Türöffneranlage
IT1117616B (it) * 1979-02-07 1986-02-17 Bpt Spa Perfezionamenti nei videocitofani

Also Published As

Publication number Publication date
FR2496377A1 (fr) 1982-06-18
DE3139594A1 (de) 1982-09-16
ES8302937A1 (es) 1983-01-16
ES507959A0 (es) 1983-01-16
IT8068903A0 (it) 1980-12-15
IT1165528B (it) 1987-04-22

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Legal Events

Date Code Title Description
ST Notification of lapse