IT1101562B - Apparecchiatura di commutazione per un impianto di chiamata,di risposta alla porta e di comando di un dispositivo apritore di porta - Google Patents

Apparecchiatura di commutazione per un impianto di chiamata,di risposta alla porta e di comando di un dispositivo apritore di porta

Info

Publication number
IT1101562B
IT1101562B IT30842/78A IT3084278A IT1101562B IT 1101562 B IT1101562 B IT 1101562B IT 30842/78 A IT30842/78 A IT 30842/78A IT 3084278 A IT3084278 A IT 3084278A IT 1101562 B IT1101562 B IT 1101562B
Authority
IT
Italy
Prior art keywords
door
commanding
answering
switching equipment
call system
Prior art date
Application number
IT30842/78A
Other languages
English (en)
Other versions
IT7830842A0 (it
Original Assignee
Siedle & Soehne S
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 Siedle & Soehne S filed Critical Siedle & Soehne S
Publication of IT7830842A0 publication Critical patent/IT7830842A0/it
Application granted granted Critical
Publication of IT1101562B publication Critical patent/IT1101562B/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)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
IT30842/78A 1977-12-16 1978-12-14 Apparecchiatura di commutazione per un impianto di chiamata,di risposta alla porta e di comando di un dispositivo apritore di porta IT1101562B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2756276A DE2756276C3 (de) 1977-12-16 1977-12-16 Schaltungsanordnung für eine Ruf-, Türsprech- und Türöffneranlage

Publications (2)

Publication Number Publication Date
IT7830842A0 IT7830842A0 (it) 1978-12-14
IT1101562B true IT1101562B (it) 1985-10-07

Family

ID=6026379

Family Applications (1)

Application Number Title Priority Date Filing Date
IT30842/78A IT1101562B (it) 1977-12-16 1978-12-14 Apparecchiatura di commutazione per un impianto di chiamata,di risposta alla porta e di comando di un dispositivo apritore di porta

Country Status (14)

Country Link
BE (1) BE872780A (it)
DE (1) DE2756276C3 (it)
DK (1) DK535478A (it)
ES (1) ES475995A1 (it)
FI (1) FI783834A (it)
FR (1) FR2412126B3 (it)
GB (1) GB2010642B (it)
IS (1) IS2466A7 (it)
IT (1) IT1101562B (it)
LU (1) LU80652A1 (it)
NL (1) NL7812007A (it)
NO (1) NO784143L (it)
PT (1) PT68875A (it)
SE (1) SE7812671L (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1110111B (it) * 1979-01-12 1985-12-23 Acet Srl Impianto citofonico a portiere elettrico a due fili,suscettibile di utilizzare un pressistente impianto a campanello,senza necessita' di ulteriori linee di alimentazione
DE4130101C1 (en) * 1991-09-11 1993-02-04 Ritto-Werk Loh Gmbh & Co Kg, 6342 Haiger, De Door intercom with door-opening button - centrally generates call signal and feeds to individual internal intercoms using circuit including two series-connected Zener diodes and parallel decoupling diode

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2113710A5 (it) * 1970-11-10 1972-06-23 Citovox

Also Published As

Publication number Publication date
GB2010642A (en) 1979-06-27
BE872780A (nl) 1979-03-30
PT68875A (pt) 1979-01-01
ES475995A1 (es) 1979-04-16
FI783834A (fi) 1979-06-17
DK535478A (da) 1979-06-17
FR2412126B3 (it) 1981-10-16
SE7812671L (sv) 1979-06-17
FR2412126A1 (it) 1979-07-13
NL7812007A (nl) 1979-06-19
NO784143L (no) 1979-06-19
DE2756276C3 (de) 1982-08-12
IT7830842A0 (it) 1978-12-14
GB2010642B (en) 1982-01-20
LU80652A1 (de) 1979-04-13
DE2756276A1 (de) 1979-06-21
IS2466A7 (is) 1978-11-24
DE2756276B2 (de) 1979-10-11

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