IT986966B - Dispositivo circuitale per il comando di un impianto citofonico - Google Patents

Dispositivo circuitale per il comando di un impianto citofonico

Info

Publication number
IT986966B
IT986966B IT2106573A IT2106573A IT986966B IT 986966 B IT986966 B IT 986966B IT 2106573 A IT2106573 A IT 2106573A IT 2106573 A IT2106573 A IT 2106573A IT 986966 B IT986966 B IT 986966B
Authority
IT
Italy
Prior art keywords
control
circuit device
phone system
door phone
door
Prior art date
Application number
IT2106573A
Other languages
English (en)
Inventor
N Bonacini
A Franza
F Calciolari
Original Assignee
Italiana Telecomuni Cazioni Si
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 Italiana Telecomuni Cazioni Si filed Critical Italiana Telecomuni Cazioni Si
Priority to IT2106573A priority Critical patent/IT986966B/it
Priority to FR7346332A priority patent/FR2220116B1/fr
Priority to ES421944A priority patent/ES421944A1/es
Application granted granted Critical
Publication of IT986966B publication Critical patent/IT986966B/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
    • 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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
IT2106573A 1973-03-01 1973-03-01 Dispositivo circuitale per il comando di un impianto citofonico IT986966B (it)

Priority Applications (3)

Application Number Priority Date Filing Date Title
IT2106573A IT986966B (it) 1973-03-01 1973-03-01 Dispositivo circuitale per il comando di un impianto citofonico
FR7346332A FR2220116B1 (it) 1973-03-01 1973-12-26
ES421944A ES421944A1 (es) 1973-03-01 1973-12-31 Perfeccionamientos en las disposiciones de circuito para elmando de una instalacion interfonica.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2106573A IT986966B (it) 1973-03-01 1973-03-01 Dispositivo circuitale per il comando di un impianto citofonico

Publications (1)

Publication Number Publication Date
IT986966B true IT986966B (it) 1975-01-30

Family

ID=11176197

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2106573A IT986966B (it) 1973-03-01 1973-03-01 Dispositivo circuitale per il comando di un impianto citofonico

Country Status (3)

Country Link
ES (1) ES421944A1 (it)
FR (1) FR2220116B1 (it)
IT (1) IT986966B (it)

Also Published As

Publication number Publication date
FR2220116B1 (it) 1977-06-24
FR2220116A1 (it) 1974-09-27
ES421944A1 (es) 1976-05-01

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