NL7809628A - Schakeling voor multipel aangesloten telefoontoestel- len. - Google Patents

Schakeling voor multipel aangesloten telefoontoestel- len. Download PDF

Info

Publication number
NL7809628A
NL7809628A NL7809628A NL7809628A NL7809628A NL 7809628 A NL7809628 A NL 7809628A NL 7809628 A NL7809628 A NL 7809628A NL 7809628 A NL7809628 A NL 7809628A NL 7809628 A NL7809628 A NL 7809628A
Authority
NL
Netherlands
Prior art keywords
circuit
supply circuit
line
telephone
subscriber
Prior art date
Application number
NL7809628A
Other languages
English (en)
Dutch (nl)
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Priority to NL7809628A priority Critical patent/NL7809628A/nl
Priority to EP79200527A priority patent/EP0009293A1/fr
Publication of NL7809628A publication Critical patent/NL7809628A/nl

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/68—Circuit arrangements for preventing eavesdropping
    • H04M1/70—Lock-out or secrecy arrangements in party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
NL7809628A 1978-09-21 1978-09-21 Schakeling voor multipel aangesloten telefoontoestel- len. NL7809628A (nl)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL7809628A NL7809628A (nl) 1978-09-21 1978-09-21 Schakeling voor multipel aangesloten telefoontoestel- len.
EP79200527A EP0009293A1 (fr) 1978-09-21 1979-09-20 Circuit pour connecter un seul à la fois d'un nombre de postes téléphoniques à une ligne d'abonné

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7809628A NL7809628A (nl) 1978-09-21 1978-09-21 Schakeling voor multipel aangesloten telefoontoestel- len.
NL7809628 1978-09-21

Publications (1)

Publication Number Publication Date
NL7809628A true NL7809628A (nl) 1980-03-25

Family

ID=19831593

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7809628A NL7809628A (nl) 1978-09-21 1978-09-21 Schakeling voor multipel aangesloten telefoontoestel- len.

Country Status (2)

Country Link
EP (1) EP0009293A1 (fr)
NL (1) NL7809628A (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332983A (en) * 1980-10-27 1982-06-01 Hosein Vakili Telephone privacy controller
ES282513Y (es) * 1984-11-12 1986-10-01 Amper, S.A. Dispositivo exclusor para telefonos instalados en paralelo
EP0233892B1 (fr) * 1985-07-18 1994-02-16 Alcatel N.V. Commutateur de lignes telephoniques
WO1987000717A1 (fr) * 1985-07-18 1987-01-29 International Standard Electric Corporation Commutateur de lignes telephoniques
JPS63217758A (ja) * 1987-03-05 1988-09-09 Nec Corp 分岐電話機
GB8903268D0 (en) * 1989-02-14 1989-04-05 Cts Trading Co Ltd Communication apparatus
WO1995018502A1 (fr) * 1993-12-27 1995-07-06 Haanes Ivar J Circuit de commutation telephonique
PE20010720A1 (es) 1999-12-11 2001-07-26 Glaxo Group Ltd Distribuidor de medicamento
GB0026647D0 (en) 2000-10-31 2000-12-13 Glaxo Group Ltd Medicament dispenser

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499121A (en) * 1966-03-03 1970-03-03 Proctor & Associates Co Communication system exclusion circuit
US3514544A (en) * 1967-04-21 1970-05-26 Charles W Chambers Jr Party line privacy device
US4039759A (en) * 1975-06-13 1977-08-02 Taylor James H Line security device

Also Published As

Publication number Publication date
EP0009293A1 (fr) 1980-04-02

Similar Documents

Publication Publication Date Title
US4118603A (en) DC signaling circuit for use in conjunction with isolation transformers
US4700380A (en) Solid state remote actuable switch
US4653084A (en) Remote actuated switch
US4074081A (en) Apparatus for detecting the level of direct current or voltage on a telephone line
US4090038A (en) Audio signal on hold circuit
NL7809628A (nl) Schakeling voor multipel aangesloten telefoontoestel- len.
US4306119A (en) Telephone outpulsing circuit
US3499121A (en) Communication system exclusion circuit
US3278687A (en) Four-layer diode network for identifying parties on a telephone line
US3784756A (en) Subscriber loop range extender
US4214127A (en) Intrinsically safe telephone network
US3551754A (en) Sensitive pick-up relay
US3284575A (en) Threshold responsive isolation for party telephone lines
US3155776A (en) Party line sub-station
US3681536A (en) Electronic telephone call restricting device
US4587380A (en) Interface for connecting standard telephones to party lines
US2862062A (en) Holding arrangement for universaltype line circuit
NL7907134A (nl) Telefooninstallatie van de als sterpuntinstallatie aangeduide soort.
US3515813A (en) Telephone ringing signal transfer device
US3953683A (en) Interrupter for telephone systems
US4190743A (en) Thyristor switching matrix
US3723829A (en) Repetitive pulse generating circuit
US3247327A (en) Telephone signalling circuits
GB990544A (en) A telephone line concentrator system
US2989593A (en) Linefinder circuit arrangement

Legal Events

Date Code Title Description
A1B A search report has been drawn up
BV The patent application has lapsed