ES439298A1 - Improvements introduced in the connections of interfone installations, intercommunication in duplex or installations of loudspeakers commanded by push buttons. (Machine-translation by Google Translate, not legally binding) - Google Patents

Improvements introduced in the connections of interfone installations, intercommunication in duplex or installations of loudspeakers commanded by push buttons. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES439298A1
ES439298A1 ES439298A ES439298A ES439298A1 ES 439298 A1 ES439298 A1 ES 439298A1 ES 439298 A ES439298 A ES 439298A ES 439298 A ES439298 A ES 439298A ES 439298 A1 ES439298 A1 ES 439298A1
Authority
ES
Spain
Prior art keywords
installations
intercommunication
duplex
translation
connections
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES439298A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEUMANN ELEKTRONIK GmbH
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 ES439298A1 publication Critical patent/ES439298A1/en
Expired legal-status Critical Current

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)
  • Circuit For Audible Band Transducer (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

Improvements introduced in the connections of interphone installations, intercommunication in duplex or loudspeaker installations controlled by pushbuttons; in which any user can communicate with a certain number that can be set at the choice of other users and in which the intercommunication is carried out through a switchboard with electronic interconnection devices, with this interconnection making the unión of the amplifiers of the respective stations, while the other stations are informed by busy signals; characterized in that each junction circuit for each of the two directions of telephony is constituted by a connection device, which is composed of four rectifiers and a reactance coil with a central base, connection device this by the station where it is called it is sent in a permeable way by the application of a continuous voltage in the central intake of the choke, the control current serving at the same time for the connection and the feeding of the simplifiers, both of the calling station as well as of the station called so that the control voltage produces the signal for busy communication for the remaining stations. (Machine-translation by Google Translate, not legally binding)
ES439298A 1974-07-17 1975-07-10 Improvements introduced in the connections of interfone installations, intercommunication in duplex or installations of loudspeakers commanded by push buttons. (Machine-translation by Google Translate, not legally binding) Expired ES439298A1 (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
ES439298A1 true ES439298A1 (en) 1977-03-01

Family

ID=5920787

Family Applications (1)

Application Number Title Priority Date Filing Date
ES439298A Expired ES439298A1 (en) 1974-07-17 1975-07-10 Improvements introduced in the connections of interfone installations, intercommunication in duplex or installations of loudspeakers commanded by push buttons. (Machine-translation by Google Translate, not legally binding)

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
SE7508032L (en) 1976-01-19
FI751974A (en) 1976-01-18
DE2434321C3 (en) 1983-12-08
NO141583B (en) 1979-12-27
FR2289079B1 (en) 1982-03-26
BE831415A (en) 1975-11-17
FI61111C (en) 1982-05-10
NO141583C (en) 1980-04-09
FR2289079A1 (en) 1976-05-21
NO752541L (en) 1976-01-20
AT341590B (en) 1978-02-10
FI61111B (en) 1982-01-29
DE2434321A1 (en) 1976-01-22
ATA482375A (en) 1977-06-15
DE2434321B2 (en) 1977-01-20
CH596721A5 (en) 1978-03-15

Similar Documents

Publication Publication Date Title
GB1534459A (en) Key telephone circuit
ES452425A1 (en) Loudspeaking teleconferencing circuit
GB1167741A (en) Photon-coupled Circuit
ES409421A1 (en) Electronic telephone transmission circuit
JPS5462711A (en) Processing system for answer of private branch exchange
CA997877A (en) Automatic voice-path switching circuit for a speaker phone telephone set
ES439298A1 (en) Improvements introduced in the connections of interfone installations, intercommunication in duplex or installations of loudspeakers commanded by push buttons. (Machine-translation by Google Translate, not legally binding)
US2146362A (en) Two-way communication system
US3898392A (en) Answer-back assembly for a key telephone system
US3331924A (en) Telephone systems
GB1399511A (en) Quadraphonic devices
GB1045371A (en) Circuit arrangement for smoothing peaks which occur in traffic in telecommunication installations, particularly satellite telephone exchanges
US2468911A (en) Communication system
US2813152A (en) Telephone intercommunication system
US1486868A (en) Intercommunicating telephone system
JPS5537025A (en) Main device of push button telephone
US2844658A (en) Arrangement for telephones with an amplifying device connected in series with the receiver capsule
US3036162A (en) Internal telephone systems
US2870256A (en) Universal loudspeaking telephone system
JPS5624896A (en) Multipartite telephone set calling system
US2632056A (en) Busy signal for intercommunicating telephone systems
US2502824A (en) Signaling device for sound powered telephone systems
JPS5545299A (en) Loudspeaker telephone circuit device controlled by voice for communication facility such as telephone facility
ES396581A1 (en) Telephone intercommunication system
KR950016420A (en) Private Switching Device with Cellular Telephone Line

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19971001