IT1117616B - Perfezionamenti nei videocitofani - Google Patents

Perfezionamenti nei videocitofani

Info

Publication number
IT1117616B
IT1117616B IT67269/79A IT6726979A IT1117616B IT 1117616 B IT1117616 B IT 1117616B IT 67269/79 A IT67269/79 A IT 67269/79A IT 6726979 A IT6726979 A IT 6726979A IT 1117616 B IT1117616 B IT 1117616B
Authority
IT
Italy
Prior art keywords
refinements
video door
door phones
phones
video
Prior art date
Application number
IT67269/79A
Other languages
English (en)
Other versions
IT7967269A0 (it
Original Assignee
Bpt 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 Bpt Spa filed Critical Bpt Spa
Priority to IT67269/79A priority Critical patent/IT1117616B/it
Publication of IT7967269A0 publication Critical patent/IT7967269A0/it
Priority to DE19803002888 priority patent/DE3002888A1/de
Priority to ES488310A priority patent/ES488310A1/es
Application granted granted Critical
Publication of IT1117616B publication Critical patent/IT1117616B/it

Links

Classifications

    • 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
    • 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
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Meter Arrangements (AREA)
IT67269/79A 1979-02-07 1979-02-07 Perfezionamenti nei videocitofani IT1117616B (it)

Priority Applications (3)

Application Number Priority Date Filing Date Title
IT67269/79A IT1117616B (it) 1979-02-07 1979-02-07 Perfezionamenti nei videocitofani
DE19803002888 DE3002888A1 (de) 1979-02-07 1980-01-28 Video-gegensprechanlage
ES488310A ES488310A1 (es) 1979-02-07 1980-02-06 Perfeccionamientos en los videofonos

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67269/79A IT1117616B (it) 1979-02-07 1979-02-07 Perfezionamenti nei videocitofani

Publications (2)

Publication Number Publication Date
IT7967269A0 IT7967269A0 (it) 1979-02-07
IT1117616B true IT1117616B (it) 1986-02-17

Family

ID=11301004

Family Applications (1)

Application Number Title Priority Date Filing Date
IT67269/79A IT1117616B (it) 1979-02-07 1979-02-07 Perfezionamenti nei videocitofani

Country Status (3)

Country Link
DE (1) DE3002888A1 (it)
ES (1) ES488310A1 (it)
IT (1) IT1117616B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1165528B (it) * 1980-12-15 1987-04-22 Urmet Spa Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto interno

Also Published As

Publication number Publication date
ES488310A1 (es) 1980-10-01
IT7967269A0 (it) 1979-02-07
DE3002888A1 (de) 1980-08-14

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