SE7508032L - CONNECTION DEVICE FOR BUTTON-CONTROLLED TELEPHONE, DUPLEX TELEPHONE OR SPEAKER SYSTEMS - Google Patents

CONNECTION DEVICE FOR BUTTON-CONTROLLED TELEPHONE, DUPLEX TELEPHONE OR SPEAKER SYSTEMS

Info

Publication number
SE7508032L
SE7508032L SE7508032A SE7508032A SE7508032L SE 7508032 L SE7508032 L SE 7508032L SE 7508032 A SE7508032 A SE 7508032A SE 7508032 A SE7508032 A SE 7508032A SE 7508032 L SE7508032 L SE 7508032L
Authority
SE
Sweden
Prior art keywords
telephone
button
connection device
speaker systems
duplex
Prior art date
Application number
SE7508032A
Other languages
Swedish (sv)
Inventor
L Bartoleit
W Herrmann
Original Assignee
Neumann Elektronik Gmbh
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 Neumann Elektronik Gmbh filed Critical Neumann Elektronik Gmbh
Publication of SE7508032L publication Critical patent/SE7508032L/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Interface Circuits In Exchanges (AREA)
SE7508032A 1974-07-17 1975-07-14 CONNECTION DEVICE FOR BUTTON-CONTROLLED TELEPHONE, DUPLEX TELEPHONE OR SPEAKER SYSTEMS SE7508032L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2434321A DE2434321C3 (en) 1974-07-17 1974-07-17 Circuit arrangement for button-controlled intercom, intercom or loudspeaker systems

Publications (1)

Publication Number Publication Date
SE7508032L true SE7508032L (en) 1976-01-19

Family

ID=5920787

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7508032A SE7508032L (en) 1974-07-17 1975-07-14 CONNECTION DEVICE FOR BUTTON-CONTROLLED TELEPHONE, DUPLEX TELEPHONE OR SPEAKER SYSTEMS

Country Status (9)

Country Link
AT (1) AT341590B (en)
BE (1) BE831415A (en)
CH (1) CH596721A5 (en)
DE (1) DE2434321C3 (en)
ES (1) ES439298A1 (en)
FI (1) FI61111C (en)
FR (1) FR2289079A1 (en)
NO (1) NO141583C (en)
SE (1) SE7508032L (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2837950C2 (en) * 1978-08-31 1986-11-13 Neumann Elektronik GmbH, 4330 Mülheim Switching device for a button-controlled exchange, counter or loudspeaker system
DE3418484C1 (en) * 1984-05-18 1985-08-29 Neumann Elektronik GmbH, 4330 Mülheim Talk-back device for a subscriber station of a key-controlled intercom system with line selection
DE4334906C2 (en) * 1993-10-13 1997-05-07 Neumann Elektronik Gmbh Device for the transmission of call and occupancy status signals from two-way or intercom systems with line selection via a two-wire transmission line

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1512811C3 (en) * 1967-04-27 1984-08-02 ANT Nachrichtentechnik GmbH, 7150 Backnang Circuit arrangement for testing the call station's own facilities in intercom systems

Also Published As

Publication number Publication date
FR2289079B1 (en) 1982-03-26
AT341590B (en) 1978-02-10
DE2434321C3 (en) 1983-12-08
DE2434321A1 (en) 1976-01-22
FI751974A (en) 1976-01-18
NO752541L (en) 1976-01-20
DE2434321B2 (en) 1977-01-20
FI61111B (en) 1982-01-29
NO141583C (en) 1980-04-09
BE831415A (en) 1975-11-17
NO141583B (en) 1979-12-27
CH596721A5 (en) 1978-03-15
ES439298A1 (en) 1977-03-01
FR2289079A1 (en) 1976-05-21
FI61111C (en) 1982-05-10
ATA482375A (en) 1977-06-15

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