IT1165924B - Sistema a due soli fili per il collegamento fra posto esterno ed i derivati negli impianti citofonici - Google Patents

Sistema a due soli fili per il collegamento fra posto esterno ed i derivati negli impianti citofonici

Info

Publication number
IT1165924B
IT1165924B IT07222/79A IT722279A IT1165924B IT 1165924 B IT1165924 B IT 1165924B IT 07222/79 A IT07222/79 A IT 07222/79A IT 722279 A IT722279 A IT 722279A IT 1165924 B IT1165924 B IT 1165924B
Authority
IT
Italy
Prior art keywords
derivatives
connection
wire system
door phone
phone systems
Prior art date
Application number
IT07222/79A
Other languages
English (en)
Other versions
IT7907222A0 (it
Inventor
Giancarlo Vospini
Mauro Stani
Original Assignee
Lt Terraneo 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 Lt Terraneo Spa filed Critical Lt Terraneo Spa
Priority to IT07222/79A priority Critical patent/IT1165924B/it
Publication of IT7907222A0 publication Critical patent/IT7907222A0/it
Priority to DE19803023988 priority patent/DE3023988A1/de
Application granted granted Critical
Publication of IT1165924B publication Critical patent/IT1165924B/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
IT07222/79A 1979-12-19 1979-12-19 Sistema a due soli fili per il collegamento fra posto esterno ed i derivati negli impianti citofonici IT1165924B (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IT07222/79A IT1165924B (it) 1979-12-19 1979-12-19 Sistema a due soli fili per il collegamento fra posto esterno ed i derivati negli impianti citofonici
DE19803023988 DE3023988A1 (de) 1979-12-19 1980-06-26 Gegensprechanlage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT07222/79A IT1165924B (it) 1979-12-19 1979-12-19 Sistema a due soli fili per il collegamento fra posto esterno ed i derivati negli impianti citofonici

Publications (2)

Publication Number Publication Date
IT7907222A0 IT7907222A0 (it) 1979-12-19
IT1165924B true IT1165924B (it) 1987-04-29

Family

ID=11124848

Family Applications (1)

Application Number Title Priority Date Filing Date
IT07222/79A IT1165924B (it) 1979-12-19 1979-12-19 Sistema a due soli fili per il collegamento fra posto esterno ed i derivati negli impianti citofonici

Country Status (2)

Country Link
DE (1) DE3023988A1 (it)
IT (1) IT1165924B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569069B1 (fr) * 1984-08-09 1987-03-06 Pellerin Christian Systeme de transmission de signaux destines notamment a la surveillance d'un ensemble de locaux a proteger
FR2620286B1 (fr) * 1987-09-04 1994-07-22 Kaddour Zanouda Portier electronique pour un immeuble d'habitation a plusieurs appartements
DE4116935C2 (de) * 1991-05-24 1993-09-30 Stewing Gmbh & Co Kg Klingelanlage für Wohnhäuser, insbesondere Mehrfamilienhäuser, Altbauten o. dgl.
DE4236565C2 (de) * 1992-10-29 1997-01-30 Deutsche Telekom Ag Türfreisprechanlage
DE19704026B4 (de) 1997-02-04 2007-12-27 Deutsche Telekom Ag Türfreisprechanlage
DE20217877U1 (de) 2002-11-18 2004-04-01 Gira Giersiepen Gmbh & Co. Kg Hauskommunikationssystem mit Zweidraht-Teilnehmeranschluss

Also Published As

Publication number Publication date
DE3023988A1 (de) 1981-07-02
IT7907222A0 (it) 1979-12-19

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