DE3167719D1 - Telephone circuit - Google Patents

Telephone circuit

Info

Publication number
DE3167719D1
DE3167719D1 DE8181304075T DE3167719T DE3167719D1 DE 3167719 D1 DE3167719 D1 DE 3167719D1 DE 8181304075 T DE8181304075 T DE 8181304075T DE 3167719 T DE3167719 T DE 3167719T DE 3167719 D1 DE3167719 D1 DE 3167719D1
Authority
DE
Germany
Prior art keywords
voice network
switch
high current
current line
dial
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
DE8181304075T
Other languages
English (en)
Inventor
Guy John Chaput
Edward Matthew Sich
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Application granted granted Critical
Publication of DE3167719D1 publication Critical patent/DE3167719D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
DE8181304075T 1980-09-23 1981-09-07 Telephone circuit Expired DE3167719D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000360856A CA1136783A (en) 1980-09-23 1980-09-23 Telephone circuit

Publications (1)

Publication Number Publication Date
DE3167719D1 true DE3167719D1 (en) 1985-01-24

Family

ID=4117962

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181304075T Expired DE3167719D1 (en) 1980-09-23 1981-09-07 Telephone circuit

Country Status (7)

Country Link
US (1) US4360710A (de)
EP (1) EP0048566B1 (de)
JP (1) JPS5784654A (de)
AT (1) ATE10792T1 (de)
CA (1) CA1136783A (de)
DE (1) DE3167719D1 (de)
IE (1) IE52247B1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495382A (en) * 1982-04-23 1985-01-22 Fairchild Camera And Instrument Corporation Telephone regulator circuitry
GB2132447B (en) * 1982-12-04 1986-07-30 Standard Telephones Cables Ltd Switch device
FR2556909B1 (fr) * 1983-12-14 1986-04-18 Radiotechnique Compelec Dispositif d'interface pour un poste telephonique
US4636588A (en) * 1984-02-29 1987-01-13 Kabushiki Kaisha Toshiba Electric source circuit for telephone sets
US4634814A (en) * 1985-02-04 1987-01-06 Gte Communication Systems Corp. Surge protected electronic switch for telephone voiceband circuits
ATE43675T1 (de) * 1985-03-20 1989-06-15 Schilling Hans Joachim Verfahren und vorrichtung zur datenuebertragung zwischen einer in einem bohrloch angeordneten sende- und empfangseinrichtung und einer ueber tage angeordneten sende- und empfangseinrichtung.
US4644103A (en) * 1985-06-04 1987-02-17 Base Ten Systems, Inc. Tone-responsive circuit for activating an instrumentality interfacing system
BR8606792A (pt) * 1985-07-18 1987-10-13 Int Standard Electric Corp Comutador de linha telefonica
US4731830A (en) * 1985-10-04 1988-03-15 Gte Communication Systems Corporation Nonsaturating interface supply
DE3538088C2 (de) * 1985-10-25 1993-11-11 Siemens Ag Schaltungsanordnung für einen Überspannungsschutz in elektronischen Fernsprechstationen
GB2193414B (en) * 1986-07-14 1990-01-04 Siliconix Ltd Telephone instrument
DE3643839A1 (de) * 1986-12-20 1988-06-30 Telefonbau & Normalzeit Gmbh Schaltungsanordnung fuer eine fernsprechteilnehmerstation mit einer steuereinrichtung
US4794640A (en) * 1987-02-24 1988-12-27 Inventa Electronics Co., Ltd. Switching control apparatus for intercom-telephone sets
IT1254796B (it) * 1992-02-17 1995-10-11 St Microelectronics Srl Dispositivo di limitazione della tensione operativa per interruttori meccanici in telefonia.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4957703A (de) * 1972-10-03 1974-06-05
FR2315811A1 (fr) * 1975-06-27 1977-01-21 Labo Cent Telecommunicat Dipole electronique pour le bouclage d'une ligne telephonique
DE2742623A1 (de) * 1977-09-22 1979-04-05 Deutsche Fernsprecher Gmbh Tastenwahlschaltungsanordnung zur impulswahl bei fernsprechanlagen
GB2021357A (en) * 1978-05-19 1979-11-28 Post Office Improvements relating to telephone substations
ATA677778A (de) * 1978-09-20 1984-02-15 Siemens Ag Oesterreich Schaltung fuer fernmelde-, insbesondere fernsprech-teilnehmerstellen, sowie uebertragungen mit impulsgebender wahlsteuerung
US4303805A (en) * 1979-05-21 1981-12-01 United Networks, Inc. Subscriber station network

Also Published As

Publication number Publication date
CA1136783A (en) 1982-11-30
ATE10792T1 (de) 1984-12-15
JPS5784654A (en) 1982-05-27
EP0048566B1 (de) 1984-12-12
US4360710A (en) 1982-11-23
IE52247B1 (en) 1987-08-19
EP0048566A1 (de) 1982-03-31
IE812202L (en) 1982-03-23

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee