IT1165528B - Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto interno - Google Patents
Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto internoInfo
- Publication number
- IT1165528B IT1165528B IT68903/80A IT6890380A IT1165528B IT 1165528 B IT1165528 B IT 1165528B IT 68903/80 A IT68903/80 A IT 68903/80A IT 6890380 A IT6890380 A IT 6890380A IT 1165528 B IT1165528 B IT 1165528B
- Authority
- IT
- Italy
- Prior art keywords
- image transmission
- phone system
- door phone
- common conductors
- selection conductor
- Prior art date
Links
- 239000004020 conductor Substances 0.000 title 2
- 230000005540 biological transmission Effects 0.000 title 1
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)
Priority Applications (4)
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 |
DE19813139594 DE3139594A1 (de) | 1980-12-15 | 1981-10-05 | Haustelefonanlage mit bilduebertragung |
FR8120802A 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 |
ES507959A ES507959A0 (es) | 1980-12-15 | 1981-12-14 | Instalacion citofonica con transmision de imagen,que utiliza cuatro conductores comunes y un conductor de seleccion para cada lugar interior . |
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 |
---|---|
IT8068903A0 IT8068903A0 (it) | 1980-12-15 |
IT1165528B true IT1165528B (it) | 1987-04-22 |
Family
ID=11310869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE3139594A1 (it) |
ES (1) | ES507959A0 (it) |
FR (1) | FR2496377A1 (it) |
IT (1) | IT1165528B (it) |
Families Citing this family (1)
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)
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 (it) * | 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 |
-
1980
- 1980-12-15 IT IT68903/80A patent/IT1165528B/it active
-
1981
- 1981-10-05 DE DE19813139594 patent/DE3139594A1/de not_active Withdrawn
- 1981-11-06 FR FR8120802A patent/FR2496377A1/fr active Granted
- 1981-12-14 ES ES507959A patent/ES507959A0/es active Granted
Also Published As
Publication number | Publication date |
---|---|
ES8302937A1 (es) | 1983-01-16 |
IT8068903A0 (it) | 1980-12-15 |
ES507959A0 (es) | 1983-01-16 |
DE3139594A1 (de) | 1982-09-16 |
FR2496377B1 (it) | 1985-03-29 |
FR2496377A1 (fr) | 1982-06-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DK329283D0 (da) | Multipel kommunikationsinterface mellem processor og digitale transmissionsorganer | |
GB8310250D0 (en) | Cable network data transmission system | |
BR8402440A (pt) | Adaptador de linha de multiplos assinantes com dispositivo de privacidade | |
JPS5665561A (en) | Conference telephone system | |
NO172880C (no) | Automatisk telefonnummer-sendingsanordning | |
JPS57160297A (en) | Multiple access system for terminal on digital telephone set | |
GB2096434B (en) | Loudspeaking telephone system | |
IT7968971A0 (it) | Blocco di connessione per fili con duttori particolarmente per fili telefonici | |
FR2543385B1 (fr) | Reseau cable de videocommunication | |
NL7806010A (nl) | Kabeltelevisiestelsel met afschakelbare abonneeaanslui- tingen. | |
ES547191A0 (es) | Un sistema telefonico con intercomunicacion | |
MX147045A (es) | Sistema digital de telecomunicacion cuando menos con una seccion de conducto de cuatro hilos | |
IT1165528B (it) | Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto interno | |
GB2128451B (en) | Systems for data transmission over a public telephone network | |
GB2000608B (en) | Facsimile data transmission system | |
GB2053533B (en) | Digital data communications device with standard option connection | |
GB2066023B (en) | Telephone line interface | |
DK158435C (da) | Fremgangsmaade til informationsoverfoering i et digitalt telekommunikationsnet samt telekommunikationsanlaeg til saadan overfoering | |
GB8415184D0 (en) | Telephone answering system | |
JPS5759409A (en) | Conductor interval holding system for multiconductor aerial transmission line | |
NO823288L (no) | Telekommunikasjonskabel for innvendig bruk. | |
DE3266289D1 (en) | Telephone cable splices | |
AR231890A1 (es) | Aparato telefonico de abonado | |
GB2113043B (en) | Telephone dialling system | |
GB2152735B (en) | Telecommunication cables |