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BE878527A - SWITCHING EQUIPMENT FOR AN INTERNAL TELEPHONE COMMUNICATION INSTALLATION, A DUPLEX INTERCOMMUNICATION INSTALLATION OR A KEY-CONTROLLED LOUDSPEAKER CALL INSTALLATION - Google Patents

SWITCHING EQUIPMENT FOR AN INTERNAL TELEPHONE COMMUNICATION INSTALLATION, A DUPLEX INTERCOMMUNICATION INSTALLATION OR A KEY-CONTROLLED LOUDSPEAKER CALL INSTALLATION

Info

Publication number
BE878527A
BE878527A BE0/196962A BE196962A BE878527A BE 878527 A BE878527 A BE 878527A BE 0/196962 A BE0/196962 A BE 0/196962A BE 196962 A BE196962 A BE 196962A BE 878527 A BE878527 A BE 878527A
Authority
BE
Belgium
Prior art keywords
installation
key
switching equipment
telephone communication
internal telephone
Prior art date
Application number
BE0/196962A
Other languages
French (fr)
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 BE878527A publication Critical patent/BE878527A/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
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/007—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line wherein the key telephone sets are star-connected to a central unit by a limited number of lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Telephonic Communication Services (AREA)
BE0/196962A 1978-08-31 1979-08-30 SWITCHING EQUIPMENT FOR AN INTERNAL TELEPHONE COMMUNICATION INSTALLATION, A DUPLEX INTERCOMMUNICATION INSTALLATION OR A KEY-CONTROLLED LOUDSPEAKER CALL INSTALLATION BE878527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782837950 DE2837950C2 (en) 1978-08-31 1978-08-31 Switching device for a button-controlled exchange, counter or loudspeaker system

Publications (1)

Publication Number Publication Date
BE878527A true BE878527A (en) 1979-12-17

Family

ID=6048319

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/196962A BE878527A (en) 1978-08-31 1979-08-30 SWITCHING EQUIPMENT FOR AN INTERNAL TELEPHONE COMMUNICATION INSTALLATION, A DUPLEX INTERCOMMUNICATION INSTALLATION OR A KEY-CONTROLLED LOUDSPEAKER CALL INSTALLATION

Country Status (6)

Country Link
AT (1) AT372560B (en)
BE (1) BE878527A (en)
CH (1) CH645493A5 (en)
DE (1) DE2837950C2 (en)
GB (1) GB2029165B (en)
NL (1) NL183264C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000858C2 (en) * 1980-01-11 1986-11-13 Neumann Elektronik GmbH, 4330 Mülheim Button-controlled exchange, counter or loudspeaker system
DE3214657C2 (en) * 1982-04-21 1985-07-04 ANT Nachrichtentechnik GmbH, 7150 Backnang Device for voice and / or data switching and transmission
DE4107593C1 (en) * 1991-03-09 1992-05-21 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
DE4107591C1 (en) * 1991-03-09 1992-03-05 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
DE4236046C1 (en) * 1992-10-24 1993-11-25 Loh Kg Ritto Werk Intercom system with centralised control - uses duplex amplifiers in connection path between calling and called speech stations with respective amplifier paths for each direction
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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1437967B2 (en) * 1965-04-28 1970-05-21 Telefunken Patentverwertungsgesellschaft Mbh, 7900 Ulm Circuit arrangement for a button-controlled intercom system
DE2434321C3 (en) * 1974-07-17 1983-12-08 Neumann Elektronik GmbH, 4330 Mülheim Circuit arrangement for button-controlled intercom, intercom or loudspeaker systems
DE2741000C2 (en) * 1977-09-12 1982-04-15 Industronic, Industrie-Electronic Gmbh & Co Kg, 6980 Wertheim Line-bound transmission system for speech communication and information processing

Also Published As

Publication number Publication date
NL183264C (en) 1988-09-01
ATA464879A (en) 1983-02-15
GB2029165B (en) 1982-08-25
DE2837950B1 (en) 1980-02-28
AT372560B (en) 1983-10-25
NL183264B (en) 1988-04-05
CH645493A5 (en) 1984-09-28
DE2837950C2 (en) 1986-11-13
NL7905213A (en) 1980-03-04
GB2029165A (en) 1980-03-12

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: NEUMANN ELEKTRONIK G.M.B.H.

Effective date: 19960831