FI61111C - Kopplingsanordning foer tryckknappsstyrda vaexelsamtals- eller hoegtalaranlaeggningar - Google Patents

Kopplingsanordning foer tryckknappsstyrda vaexelsamtals- eller hoegtalaranlaeggningar Download PDF

Info

Publication number
FI61111C
FI61111C FI751974A FI751974A FI61111C FI 61111 C FI61111 C FI 61111C FI 751974 A FI751974 A FI 751974A FI 751974 A FI751974 A FI 751974A FI 61111 C FI61111 C FI 61111C
Authority
FI
Finland
Prior art keywords
subscriber
switching device
switching
transistor
subscribers
Prior art date
Application number
FI751974A
Other languages
English (en)
Finnish (fi)
Other versions
FI61111B (fi
FI751974A7 (en, 2012
Inventor
Lothar Bartoleit
Walter 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 FI751974A7 publication Critical patent/FI751974A7/fi
Publication of FI61111B publication Critical patent/FI61111B/fi
Application granted granted Critical
Publication of FI61111C publication Critical patent/FI61111C/fi

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)
  • Mobile Radio Communication Systems (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Devices For Supply Of Signal Current (AREA)
FI751974A 1974-07-17 1975-07-07 Kopplingsanordning foer tryckknappsstyrda vaexelsamtals- eller hoegtalaranlaeggningar FI61111C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2434321A DE2434321C3 (de) 1974-07-17 1974-07-17 Schaltungsanordnung für tastengesteuerte Wechselsprech-, Gegensprech- oder Lautsprecheranlagen
DE2434321 1974-07-17

Publications (3)

Publication Number Publication Date
FI751974A7 FI751974A7 (en, 2012) 1976-01-18
FI61111B FI61111B (fi) 1982-01-29
FI61111C true FI61111C (fi) 1982-05-10

Family

ID=5920787

Family Applications (1)

Application Number Title Priority Date Filing Date
FI751974A FI61111C (fi) 1974-07-17 1975-07-07 Kopplingsanordning foer tryckknappsstyrda vaexelsamtals- eller hoegtalaranlaeggningar

Country Status (9)

Country Link
AT (1) AT341590B (en, 2012)
BE (1) BE831415A (en, 2012)
CH (1) CH596721A5 (en, 2012)
DE (1) DE2434321C3 (en, 2012)
ES (1) ES439298A1 (en, 2012)
FI (1) FI61111C (en, 2012)
FR (1) FR2289079A1 (en, 2012)
NO (1) NO141583C (en, 2012)
SE (1) SE7508032L (en, 2012)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2837950C2 (de) * 1978-08-31 1986-11-13 Neumann Elektronik GmbH, 4330 Mülheim Vermittlungseinrichtung für eine tastengesteuerte Wechsel-, Gegen- oder Lautsprechanlage
DE3418484C1 (de) * 1984-05-18 1985-08-29 Neumann Elektronik GmbH, 4330 Mülheim Rücksprecheinrichtung für eine Teilnehmerstelle einer tastengesteuerten Wechselsprechanlage mit Linienwahl
DE4334906C2 (de) * 1993-10-13 1997-05-07 Neumann Elektronik Gmbh Einrichtung zur Übertragung von Ruf- und Belegungszustandssignalen von Wechsel- oder Gegen-Lautsprechanlagen mit Linienwahl über eine Zweidraht-Fernleitung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1512811C3 (de) * 1967-04-27 1984-08-02 ANT Nachrichtentechnik GmbH, 7150 Backnang Schaltungsanordnung für die Prüfung der sprechstelleneigenen Einrichtungen in Sprechanlagen

Also Published As

Publication number Publication date
FI61111B (fi) 1982-01-29
DE2434321C3 (de) 1983-12-08
BE831415A (fr) 1975-11-17
NO141583B (no) 1979-12-27
NO141583C (no) 1980-04-09
CH596721A5 (en, 2012) 1978-03-15
SE7508032L (sv) 1976-01-19
ES439298A1 (es) 1977-03-01
ATA482375A (de) 1977-06-15
DE2434321B2 (de) 1977-01-20
FI751974A7 (en, 2012) 1976-01-18
AT341590B (de) 1978-02-10
FR2289079A1 (fr) 1976-05-21
FR2289079B1 (en, 2012) 1982-03-26
NO752541L (en, 2012) 1976-01-20
DE2434321A1 (de) 1976-01-22

Similar Documents

Publication Publication Date Title
FI61111C (fi) Kopplingsanordning foer tryckknappsstyrda vaexelsamtals- eller hoegtalaranlaeggningar
USRE27680E (en) Polarity sensitive voltage inserttion circuit for long subscriber loops
US2871303A (en) Telephone intercommunication system having means for interconnecting any two stations
KR910006607B1 (ko) 불평형 통신로를 사용하는 통신시스템
EP0749654B1 (de) Kompakt-fernsprechendgerät
US647300A (en) Telephone signaling system.
US836904A (en) Automatic system of intercommunication.
US3205307A (en) Circuit for intercommunication systems
US562906A (en) Signaling apparatus for telephone-lines
US2644039A (en) Circuit arrangement for conference call installations
US2805285A (en) Circuit-arrangement for operating a loudspeaker installation
US826317A (en) Selective signal system.
US2515432A (en) Intercommunication system
US3091667A (en) Intercommunication system
US3142725A (en) Intercommunication system
US1117832A (en) Signaling system.
SE194238C1 (en, 2012)
US541077A (en) Of same place
US970975A (en) Private-branch intercommunicating telephone system.
US2009076A (en) Telephone system
US492483A (en) Busy-signal for telephone-circuits
US731166A (en) Electric telephone system.
JPH0260350A (ja) フック検出回路
GB1041009A (en) Marker for multi-stage crosspoint arrangement in telecommunication, particularly telephone exchange systems
JPH03104374A (ja) 有線放送電話用スピーカと電話機とのブランチ接続方式

Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: NEUMANN ELEKTRONIK GMBH