DE3484442D1 - Rufabschaltungserkennungssystem. - Google Patents

Rufabschaltungserkennungssystem.

Info

Publication number
DE3484442D1
DE3484442D1 DE8484100265T DE3484442T DE3484442D1 DE 3484442 D1 DE3484442 D1 DE 3484442D1 DE 8484100265 T DE8484100265 T DE 8484100265T DE 3484442 T DE3484442 T DE 3484442T DE 3484442 D1 DE3484442 D1 DE 3484442D1
Authority
DE
Germany
Prior art keywords
trip
hook
wave form
comparator
ringing signal
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 - Fee Related
Application number
DE8484100265T
Other languages
English (en)
Inventor
Bruce G Littlefield
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.)
Redcom Laboratories Inc
Original Assignee
Redcom Laboratories Inc
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 Redcom Laboratories Inc filed Critical Redcom Laboratories Inc
Application granted granted Critical
Publication of DE3484442D1 publication Critical patent/DE3484442D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Telephonic Communication Services (AREA)
DE8484100265T 1983-01-13 1984-01-12 Rufabschaltungserkennungssystem. Expired - Fee Related DE3484442D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/457,556 US4524245A (en) 1983-01-13 1983-01-13 Ring trip detection system

Publications (1)

Publication Number Publication Date
DE3484442D1 true DE3484442D1 (de) 1991-05-23

Family

ID=23817185

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484100265T Expired - Fee Related DE3484442D1 (de) 1983-01-13 1984-01-12 Rufabschaltungserkennungssystem.

Country Status (5)

Country Link
US (1) US4524245A (de)
EP (1) EP0116291B1 (de)
JP (1) JPH0634491B2 (de)
AT (1) ATE62782T1 (de)
DE (1) DE3484442D1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633040A (en) * 1984-10-25 1986-12-30 Candela Electronics, Inc. Personal branch exchange system
US4731828A (en) * 1985-06-07 1988-03-15 Plessey Overseas Limited Ring trip detection in telecommunications exchanges
DE3545574A1 (de) * 1985-12-21 1987-07-02 Philips Patentverwaltung Verfahren und schaltungsanordnung zur auswertung der ausgangssignale von stromflussdetektoren in fernmeldeanlagen
US4805172A (en) * 1987-04-10 1989-02-14 Redeom Laboratories, Inc. Time division multiplex (TDM) switching system especially for pulse code modulated (PCM) telephony signals
US5233649A (en) * 1990-08-30 1993-08-03 Guerra Jr Roy H Telephone ringing module
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.
CA2146596C (en) * 1994-04-29 1999-09-21 Harry W. Moore, Iii Loop current detector
JP2891143B2 (ja) * 1995-07-28 1999-05-17 日本電気株式会社 リングトリップ回路
SE511917C2 (sv) * 1996-12-10 1999-12-13 Ericsson Telefon Ab L M Förfarande för anordning för att detektera en ringbortkoppling
US5987120A (en) * 1997-12-01 1999-11-16 Winbond Electronics Corp. Device for identifying line reversal/ringing signal of a telephone set
GB2447177A (en) * 2006-01-10 2008-09-03 Daihatsu Motor Co Ltd Air-fuel ratio judging method of internal combustion engine based on ion current

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941939A (en) * 1974-11-25 1976-03-02 International Telephone And Telegraph Corporation Electronic ring trip circuit
GB1479094A (en) * 1975-03-25 1977-07-06 Standard Telephones Cables Ltd Ring trip detectors
FR2470498A1 (fr) * 1979-11-21 1981-05-29 Trt Telecom Radio Electr Dispositif de detection du bouclage d'une ligne d'abonne pendant la sonnerie
IT1128374B (it) * 1980-02-19 1986-05-28 Cselt Centro Studi Lab Telecom Circuito telefonico per la generazione del ritmo di suoneria ed il riconoscimento dello sgancio
US4447675A (en) * 1982-10-29 1984-05-08 Bell Telephone Laboratories, Incorporated Ring-trip detector

Also Published As

Publication number Publication date
JPH0634491B2 (ja) 1994-05-02
EP0116291A3 (en) 1986-08-20
EP0116291A2 (de) 1984-08-22
JPS6022857A (ja) 1985-02-05
ATE62782T1 (de) 1991-05-15
EP0116291B1 (de) 1991-04-17
US4524245A (en) 1985-06-18

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee