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ZA76196B - Improvements in or relating to ring trip detectors - Google Patents

Improvements in or relating to ring trip detectors

Info

Publication number
ZA76196B
ZA76196B ZA760196A ZA76196A ZA76196B ZA 76196 B ZA76196 B ZA 76196B ZA 760196 A ZA760196 A ZA 760196A ZA 76196 A ZA76196 A ZA 76196A ZA 76196 B ZA76196 B ZA 76196B
Authority
ZA
South Africa
Prior art keywords
relating
ring trip
detectors
trip detectors
ring
Prior art date
Application number
ZA760196A
Other languages
English (en)
Inventor
M Dyer
R Kitajewski
A Sweet
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of ZA76196B publication Critical patent/ZA76196B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/026—Arrangements for interrupting the ringing current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Manipulation Of Pulses (AREA)
ZA760196A 1975-03-25 1976-01-14 Improvements in or relating to ring trip detectors ZA76196B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12370/75A GB1479094A (en) 1975-03-25 1975-03-25 Ring trip detectors

Publications (1)

Publication Number Publication Date
ZA76196B true ZA76196B (en) 1977-02-23

Family

ID=10003299

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA760196A ZA76196B (en) 1975-03-25 1976-01-14 Improvements in or relating to ring trip detectors

Country Status (10)

Country Link
US (1) US4022980A (de)
AU (1) AU502746B2 (de)
BE (1) BE839982R (de)
BR (1) BR7601802A (de)
CH (1) CH600721A5 (de)
ES (1) ES446362A1 (de)
FR (1) FR2305900A1 (de)
GB (1) GB1479094A (de)
NO (1) NO761023L (de)
ZA (1) ZA76196B (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7700719A (nl) * 1977-01-25 1978-07-27 Philips Nv Storingsongevoelig lijnsupervisiecircuit.
US4104488A (en) * 1977-05-19 1978-08-01 International Standard Electric Corporation Subscriber line circuit
US4447673A (en) * 1977-12-27 1984-05-08 Stromberg-Carlson Corporation Ring trip apparatus for a line circuit connected to DCO switch
GB2013000A (en) * 1978-01-20 1979-08-01 Hitachi Ltd Dc D.C. magnetic field cancellation circuit
US4455456A (en) * 1982-04-26 1984-06-19 International Telephone And Telegraph Corporation Digital supervisory circuit for a telephone system
US4524245A (en) * 1983-01-13 1985-06-18 Redcom Laboratories Inc. Ring trip detection system
GB2146872B (en) * 1983-09-15 1986-11-05 Stc Plc Hall effect module for loop detector
CA1240085A (en) * 1984-05-30 1988-08-02 Kenji Takato Calling signal transmission apparatus
JPH0726978B2 (ja) * 1988-09-22 1995-03-29 東洋通信機株式会社 電流センサ回路
IT1248549B (it) * 1991-06-25 1995-01-19 Sgs Thomson Microelectronics Complesso circuitale telefonico ad attacco d'utente elettronico con circuito per la rivelazione dello sgancio in fase di suoneria a numerodi componenti ridotto.
JP2564743Y2 (ja) * 1991-07-01 1998-03-09 株式会社村田製作所 電話回線用センサユニット
US6348752B1 (en) * 1992-04-06 2002-02-19 General Electric Company Integral motor and control
US5479499A (en) * 1993-12-15 1995-12-26 Murata Manufacturing Co., Ltd. Sensor circuit for voice/fax switch with cascaded amplifier circuit
US5982122A (en) * 1996-12-05 1999-11-09 General Electric Company Capacitively powered motor and constant speed control therefor
US6289100B1 (en) 1999-03-09 2001-09-11 Hubbell Incorporated Communications station having hall effect device for controlling hookswitch operations
JP2019083622A (ja) * 2017-10-30 2019-05-30 日本電産株式会社 駆動回路

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1158584B (de) * 1962-08-16 1963-12-05 Telefunken Patent Schaltungsanordnung zur Pruefung des Anruf- und Belegungszustandes der Teilnehmerleitungen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen mit Hilfe von Hall-Generatoren
US3848094A (en) * 1972-12-29 1974-11-12 Stromberg Carlson Corp Telephone battery feed circuit
NL7301486A (de) * 1973-02-01 1974-08-05
US3899644A (en) * 1974-06-19 1975-08-12 Data Time AC/DC-monitoring telephone line ringing voltage detector

Also Published As

Publication number Publication date
US4022980A (en) 1977-05-10
AU1186176A (en) 1977-09-15
GB1479094A (en) 1977-07-06
AU502746B2 (en) 1979-08-09
FR2305900A1 (fr) 1976-10-22
CH600721A5 (de) 1978-06-30
BR7601802A (pt) 1976-09-28
NO761023L (de) 1976-09-28
ES446362A1 (es) 1977-10-01
BE839982R (nl) 1976-09-27

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