BE830487A - INTERCOM INSTALLATION WITH PARALLEL DEVICE ON ONE LINE ON A SINGLE TWO-WIRE LINE - Google Patents

INTERCOM INSTALLATION WITH PARALLEL DEVICE ON ONE LINE ON A SINGLE TWO-WIRE LINE

Info

Publication number
BE830487A
BE830487A BE157549A BE157549A BE830487A BE 830487 A BE830487 A BE 830487A BE 157549 A BE157549 A BE 157549A BE 157549 A BE157549 A BE 157549A BE 830487 A BE830487 A BE 830487A
Authority
BE
Belgium
Prior art keywords
line
parallel device
intercom installation
wire
wire line
Prior art date
Application number
BE157549A
Other languages
French (fr)
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 filed Critical
Publication of BE830487A publication Critical patent/BE830487A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Mobile Radio Communication Systems (AREA)
BE157549A 1974-06-27 1975-06-20 INTERCOM INSTALLATION WITH PARALLEL DEVICE ON ONE LINE ON A SINGLE TWO-WIRE LINE BE830487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT51772/74A IT1029547B (en) 1974-06-27 1974-06-27 INTERCOM SYSTEM WITH PARALLEL DEVICES ON A SINGLE TWO-WIRE LINE

Publications (1)

Publication Number Publication Date
BE830487A true BE830487A (en) 1975-10-16

Family

ID=11275703

Family Applications (1)

Application Number Title Priority Date Filing Date
BE157549A BE830487A (en) 1974-06-27 1975-06-20 INTERCOM INSTALLATION WITH PARALLEL DEVICE ON ONE LINE ON A SINGLE TWO-WIRE LINE

Country Status (9)

Country Link
JP (1) JPS5125003A (en)
BE (1) BE830487A (en)
DE (1) DE2528854A1 (en)
DK (1) DK291475A (en)
FR (1) FR2276755A1 (en)
IT (1) IT1029547B (en)
LU (1) LU72821A1 (en)
NL (1) NL7507718A (en)
SE (1) SE7507069L (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52118091U (en) * 1976-03-03 1977-09-07
DE2819386A1 (en) * 1978-05-03 1979-11-08 Bosch Gmbh Robert REMOTE CONTROL FOR RADIO INTERCOMS
IT1110111B (en) * 1979-01-12 1985-12-23 Acet Srl TWO-WIRE ELECTRIC DOOR ENTRY SYSTEM, SUSCEPTABLE TO USE A PRESSISTING DOOR BELL SYSTEM, WITHOUT THE NEED FOR ADDITIONAL POWER LINES
DE2946177C2 (en) * 1979-11-15 1988-08-18 S. Siedle & Söhne Telefon- und Telegrafenwerke GmbH, 7743 Furtwangen House system for the transmission of information
JPS56109065A (en) * 1980-02-01 1981-08-29 Fujitsu Ltd Selective callout system by push button telephone set
JPS5745768A (en) * 1980-08-30 1982-03-15 Matsushita Electric Works Ltd Emergency telephone device
DE3320397A1 (en) * 1983-06-06 1984-12-06 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR THE TRANSFERABLE TRANSMISSION OF SOUND SIGNALS
JPH0620210B2 (en) * 1985-01-30 1994-03-16 アイホン株式会社 Intercom telephone hybrid device
JPS61128860U (en) * 1985-01-31 1986-08-12
JPS6276851A (en) * 1985-09-30 1987-04-08 Hitachi Elevator Eng & Serv Co Ltd Channel selection device for multi-station interphone

Also Published As

Publication number Publication date
JPS5125003A (en) 1976-03-01
IT1029547B (en) 1979-03-20
LU72821A1 (en) 1975-09-29
DK291475A (en) 1975-12-28
SE7507069L (en) 1975-12-29
NL7507718A (en) 1975-12-30
FR2276755A1 (en) 1976-01-23
DE2528854A1 (en) 1976-01-08

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